air pollution, soil pollution, noise pollution, deforestation, water pollution,..........

I think air pollution is the most serious because it's cause many diseases: lung cancer, pneumonia,...

cảm ơn bạn nhiều <3

Each invention usually comes along with its own inventor; however, the Internet - one of the greatest discoveries of mankind in the 20th century has no single inventor. It first started in the United States more than 50 years ago, and it kept evolved through time. For decades, scientists had been using it to communicate and share data with others. Many scientists and researchers had developed the best way of sending information from one computer to another. The very first computer was located in a laboratory at University of California, and it was about the size of a small house. By the end of 1969, there were just four computers that were connected to the Government’s Computer Network, but the network grew steadily during the 1970s. By the end of the 1970s, a computer scientist named Vinton Cerf had developed a way for all of the computers on all of the world’s mini-networks to communicate with one another. The Internet had a significant changing in 1991. That year, a computer programmer named Tim Berners-Lee introduced the World Wide Web: a “web” of information that anyone on the Internet could retrieve. Since then, the Internet has changed in many ways. Most recently, social networking sites Facebook, Twitter, YouTube, Instagram etc have become a popular way for people of all ages to stay connected. Today, we use the Internet for almost everything, and it would be impossible for many people to imagine life without it.
Dịch:
Mỗi một phát minh thường đi kèm với người đã sáng tạo ra nó; tuy nhiên, mạng Internet – một trong những phát hiện vĩ đại nhất của loài người trong thế kỉ 20 lại không có một người phát minh riêng lẻ nào. Nó bắt đầu lần đầu tiên vào hơn 50 năm trước tại Hoa Kì, và nó luôn tiến hóa theo thời gian. Trong nhiều thập kỉ, các nhà khoa học đã sử dụng nó để giao tiếp và chia sẻ dữ liệu với nhau. Rất nhiều nhà khoa học và nhà nghiên cứu đã phát triển cách tốt nhất để gửi thông tin từ một máy vi tính này sang máy khác. Chiếc máy vi tính để bàn đầu tiên được đặt ở một phòng thí nghiệm tại Đại học California, và nó gần bằng kích thước của một căn nhà nhỏ. Vào cuối năm 1969, chỉ có duy nhất 4 chiếc máy vi tính được kết nối với Mạng lưới Vi tính Quốc gia, nhưng hệ thống này phát triển bền vững trong những năm 1970. Vào cuối thập niên 70, một nhà khoa học máy tính tên Vinton Cerf đã phát triển một cách để tất cả máy vi tính trong một mạng lưới nhỏ toàn cầu có thể giao tiếp với nhau. Mạng Internet có một thay đổi nổi bật vào năm 1991. Vào năm đó, một nhà lập trình vi tính có tên Tim Berners-Lee giới thiệu cụm từ Mạng lưới toàn cầu: một “mạng nhện” thông tin mà tất cả mọi người trên Internet đều có thể lấy được. Kể từ đó, mạng Internet đã thay đổi theo nhiều cách. Gần đây nhất, những trang mạng xã hội như Facebook, Twitter, Youtube, Instagram..v..v. đã và đang trở thành một cách thức phổ biến để người dân ở mọi lứa tuổi có thể liên kết với nhau. Ngày nay, chúng ta sử dụng mạng Internet cho hầu hết mọi việc, và nhiều người sẽ không thể nào tưởng tượng được cuộc sống không có nó.

~ Học tốt ~

bạn Đinh Ba làm ngắn lại giùm mình với cớ tầm 5-7 dòng thôi. chứ mai thi rồi học không kịp

1. Don't do that Hung!

2. Please keep silent about this

3. You can't go out at night.

Cho 1 câu trả lời giải trí, chỉ là giải trí thôi nhé, vào bài kiểm tra mà viết như vậy là de-rô lun đó : " In these situations, if it's me, I will ignore them, they would to do what they want!!! "

*Có nghĩa là: Trong những tình huống này, nếu là tôi, tôi sẽ bỏ qua họ, họ thích làm những gì họ muốn!!! (mình ko biết ngữ pháp câu có đúng ko nhưng về nghĩa thì đúng đó)

~Cuối cùng chúc bạn học tốt!!!~

He gets up early in the morning so as not to late for school

k cho mik

HOK TỐT

He gets up early in the morning so as not to be late for school.

-Some people believe that 13 is an .unluckily .number(luckily)

- There is a .flight........to London daily.( fly)

- You should cool the burn immediately to.minimize.......tissue damage. ( minimum)

- I can't sing as.beautiful......as Jane.( beauty)

~hok tốt~

Communication plays a role in all information exchanged between living species. Technically speaking, even plants and fungi communicate with each other.

What sets us humans apart is the speed at which our means of communication develops and innovates. Technology has been helping us to communicate easier, faster and more often. We’re now at a point where we’re “always on” and panic sets in when we temporarily lose the ability to communicate – for example when we lose the data connection our mobile phone.

#Hk_tốt

#Ken'z

1. Our sources of energy will soon end if we don't  try to save them.

-> Unless we try to save them, our sources of energy will soon end..................................................

2. Barbara plays chess better than Mike.

-> Mike doesn't .play chess as well as Barbara ........................................

3. Despite the silly story, many people enjoyed the film. (Although)

-> ......Although the story is still , many people enjoyed the film........................................................

4. Although the ket price was high, many people went to see that film. (However)

-> ........The ket price was high. Howerver  many people went to see that film......................................................

5. He performs very well, although he is young. (Despite)

-> ......Despite the fact that he is young, he performs very well.........................................................

6. It was a comedy, but I didn't find it funny at all. (Inspite of)

-> .....Inspite of the fact that .it was a comedy, but I didn't find it funny at all.........................................................

7. The film was so boring. However, Jack saw it from beginning to end. (but)

-> .......The film was so boring but Jack saw it from beginning to end. .......................................................

8. In spite of having a happy ending, the film begins with a terrible disaster. (Although)

-> ........Although the film have a happy ending, it begins with a terrible disaster​......................................................

9. Although the film was a bit fightening. I really enjoyed it. (Despite)

-> .......Despite the fact that  the film was a bit fightening. I really enjoyed it. .......................................................

10. He is young, but he performs very well. (in spite of)

-> ......In spite of his young age, he performs very well​ ........................................................

Rewrite the sentence, using the word in the bracket:

1. Our sources of energy will soon end if we don't  try to save them.

-> Unless ...we try to save them,Our sources of energy will soon end...........................

2. Barbara plays chess better than Mike.

-> Mike doesn't ...........play chess as well as Barbara  ..................

3. Despite the silly story, many people enjoyed the film. (Although)

-> ............Although the story was silly, many people enjoyed the film.........

4. Although the ket price was high, many people went to see that film. (However)

-> ...............the ket price was high,However; many people went to see that film.............................

5. He performs very well, although he is young. (Despite)

-> ..............Despite being young,He performs very well.............................

6. It was a comedy, but I didn't find it funny at all. (Inspite of)

-> .............Inspite of being a comedy, I didn't find it funny at all........................

7. The film was so boring. However, Jack saw it from beginning to end. (but)

-> .........................The film was so boring,but Jack saw it from beginning to end. ...............

8. In spite of having a happy ending, the film begins with a terrible disaster. (Although)

-> ......Although the film has a happy ending, it begins with a terrible disaster. .....

9. Although the film was a bit fightening. I really enjoyed it. (Despite)

-> .........Despite a bit fightening. I really enjoyed  the film .......................

10. He is young, but he performs very well. (in spite of)

-> ..............in spite of being young, he performs very well. ..................

II. Choose the word which has the underlined part pronounced differently from the rest.
Question 6. A. recycle B. medical C. chemical D. athle
Question 7. A. pollute B. botanic C. contaminate D. economy
Question 8. A. into B. history C. tiny D. disease
III. Choose the word which is stressed differently from the rest.
Question 9. A. national B. grammaal C. medical D. chemical
Question 10. A. athle B. historic C. drama D. classic
Question 11. A. scientifically B. economic C. artis D. scientific

IV. Choose the correct answer to complete each sentence.
Question 12. Water pollution can put negative __________ on our health.
A. contamination B. affects C. effects D. problems
Question 13. A: How can light pollution __________ animals?
B: It can make animals change their behavior patterns.
A. cause B. make C. affect D. lead
Question 14. The dove is a universal __________ of peace.
A. symbolizing B. symbolize C. symbolic D. symbol
Question 15. The city has an atmosphere which is quite __________. You will never feel that in other
places.
A. important B. normal C. unique D. common
Question 16. __________ about the storm that stroke Hanoi last night?
A. Did you hear B. Do you heard C. Have you hear D. Did you heard
Question 17. Many people __________ because of the earthquake last week.
A. did injure B. injured C. have injured D. were injured
Question 18. When I looked at the river, I knew it __________ for a long time.
A. had contaminated B. had been contaminated
C. was contaminated D. contaminated
Question 19. All flights to Ha Noi had to be cancelled __________ the storm.
A. as a result B. due to C. because D. so
Question 20. When we were young, we __________ in the river near our home.
A. used to swim B. have swum C. had swum D. were swimming
V. Find a mistake in each sentence.
Question 21. My father worked (A) in a noisy factory for (B) a long time, since (C) he suffered from hearing
loss (D).
Question 22. The River Thames flows (A) through southern (B) England and connect (C) London with (D)
the sea.
Question 23. Much (A) of the town was reconstruct (B) after (C) the tornado (D).
Question 24. Look at (A) those (B) grey clouds! It will (C) rain soon (D).
Question 25. Students might (A) only use the (B) laboratory once (C) a (D) week.

Chọn 1 từ trong ngoặc:

1. Next week our class is having a discussion about finding_______ways to reuse old items before throwing them away. (Interested/ Surprising/ Useless/ Survey)

2. It is a good idea to______our clothes with our friends or cousins. ( Change / Swap/ Turn/ Send)

3. If people turn off all electric appliances in one hour all over the world, they can save a lots of_________( Electric/ Electrical/ Electrician/ electricity)

4. You should put the food in a reusable box___plas bags. (By/ Instead of/ Because of/ Without)

5. If we use_______paper, we will save a lot of trees. (Fewer/ Less/ More/ Much)

6. Don' t throw rubbish into the river because you will make it______________>(Greener/ Dirty/ Cleane/ Fresher)

7. If there  is a rubbish bin in every class, the classroom will become_______________( Harmful/ Lighter/ Dirtier/ Cleaner)

8. If we all use_________bags, we will help the environment. ( New/ Cheap/ Reusable/ Reduced)

9. This newspaper is made of_____paper. (Recycle/ Recycled/ Old/ Waste)

10. Please collect all the recyclable materials, and take them to the_______-factory. ( Recycle/ Recycled/ Recyclable/ Recycling)

11. Reduce, reuse, recycle is said to encourage people to waste less, by using less and using things, in order to__________the environment. (Harm/ Damage/ Pollute/ Protect)

12. These three Rs_____________reduce, reuse and recucle. (Stand up/ Stand for/ Ask for/ Means)

13. If you have old clothes, will you give them to those___________?(Needs/ To need/ For needing/ In need)

14. It's very_________--to swim there. The water is healthy polluted (safe/unsafe/unpopular/exciting)

15. Many girls and women_________aerobics to keep fit. (play/ go/ do/ have)