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3 tháng 3 2020

The next important question we have to decide is when we have to submit the proposal.

                  A                            B          C                                 D

Have to thành have

10 tháng 4 2021

nếu thay have to thành have thì decide phai chuyển thành decided chứ bn

9 tháng 4 2020

Mik nghĩ là ý B

3 tháng 3 2020

check xem đúng k nhé bạn . chắc sai đề .

TL: Cửa sổ không an toàn.

hok tốt!!!

trl: The window is not safe run:

Cửa sổ không an toàn.

Hok tốt !

#Tử Thần ^^

IV. Choose the word (a, b, c, or d) that best fits each of the blank spaces.How can we keep our teeth (21) ______? Firstly, we ought to visit our (22) ____ twice a year. Secondly, we should brush our teeth (23) ____ a toothbrush and fluoride toothpaste at least twice a day, once after breakfast and once before we go to bed. We can also use toothpicks (24) _____between our teeth after a meal. Thirdly, we (25) ______ eat food that is good (26) ______ our teeth and our body: milk, fish, brown...
Đọc tiếp

IV. Choose the word (a, b, c, or d) that best fits each of the blank spaces.
How can we keep our teeth (21) ______? Firstly, we ought to visit our (22) ____ twice a year. Secondly, we should brush our teeth (23) ____ a toothbrush and fluoride toothpaste at least twice a day, once after breakfast and once before we go to bed. We can also use toothpicks (24) _____between our teeth after a meal. Thirdly, we (25) ______ eat food that is good (26) ______ our teeth and our body: milk, fish, brown bread, raw vegetables, fresh fruit, etc.
21. a. health     b. healthy    c. healthily    d. unhealthy
22. a. dentist     b. doctor    c. teacher    d. engineer
23. a. on     b. of    c. by    d. with
24. A. clean    b. to clean    c. cleaning    d. to cleaning
25. a. should    b. ought to    c. need    d. a & b
26. a. for    b. at    c. on    d. to
V. Read the following passage and choose the item (a, b, c, or d) that best answers each of the questions about it.
A: Hi. Can I help you?
B: Yes, please. Could I have something fpr a cough? I think I’m getting a cold.
A: Well, I sugest a box of these cough syrup. And you should get a bottle of vitamin C, too.
B: Thank you. And what do you have for dry skin?
A: Try some of this new lotion. It’s very good.
B: OK. Thanks a lot.
27. What does the word ‘cold’ in line 2 mean?
a. low temperature         b. not hot or warm     
c. a common illness         d. not heated or cooked
28. The first speaker suggested that the second speaker should buy_____.
a. a box of cough syrup     b. a bottle of vitamin C 
c. a new lotion for dry skin     d. all are correct 
29. The second speaker is a_______.
a. patient     b. doctor     c. dentist         d. nurse
30. They are talking in a______.
a. theater     b. stadium     c. drugstore         d. dentist’s
31. Which of the following is not true?
a. Vitamin C is good for a cold.
b. Cough syrup is good for a cough. 
c. There is a new lotion for dry skin.
d. The second speaker doesn’t want to buy the new lotion.

1
3 tháng 3 2020

21b 

22a

23d

24b

25d

26a

27c

28d

29a

30c

31d

            Chúc bạn học tốt nha ^v^

2 tháng 3 2020

B nha bạn

A.wrapped          B.fixed                  C.polished                D.crooked

ttiiikk nha

2 tháng 3 2020

1, What do farmers often use for fertilizing their fields?

2, When will they carry out this project?

3, Who will she invite to her party?

4, How many medical experts do they employ to find out vaccine?

5, How often does Nhu praces speaking English at club?

1.       She fell_______ her bike and hit her head_______ the road.2.       What is the address_______ the school?3.       The ambulance will be there_______ about ten minutes.4.       Don’t overheat the victim_______ blankets or coats.5.       Cover the burned area_______ a thick sterile dressing.6.       Thank you very much _______ the flowers you sent to me.7.       You should ease the pain_______ ice or cold water packs.8.       The victim should drink a cup_______ tea when...
Đọc tiếp

1.       She fell_______ her bike and hit her head_______ the road.

2.       What is the address_______ the school?

3.       The ambulance will be there_______ about ten minutes.

4.       Don’t overheat the victim_______ blankets or coats.

5.       Cover the burned area_______ a thick sterile dressing.

6.       Thank you very much _______ the flowers you sent to me.

7.       You should ease the pain_______ ice or cold water packs.

8.       The victim should drink a cup_______ tea when reviving.

9.       Your flowers will really help to cheer me_______.

10.  I’ll phone you_______ Saturday afternoon.

11.  Calm _______. Could you please tell me what happened?

12.  The hospital will send an ambulance to the scene _______10 minutes.

13.  Thank you very much _______the present you sent to me.

14.  Will you come to my house _______the weekend?

15.  Although her legs were broken, she can go _______work.

16.  You must get _______early so as not to be late _______school.        

17.  Because of the heavy rain, we didn’t want go _______last night.

18.  Remember not to overheat the victim _______blankets or coats.

19.  It’s very kind _______ you to help me.

20.  Mai is standing _______the chair next _______the table.

1
3 tháng 3 2020

1.       She fell_______ her bike and hit her head_______ the road. OFF....ON

2.       What is the address_______ the school? OF

3.       The ambulance will be there_______ about ten minutes. IN

4.       Don’t overheat the victim_______ blankets or coats. OF

5.       Cover the burned area_______ a thick sterile dressing. WITH 

6.       Thank you very much _______ the flowers you sent to me. FOR

7.       You should ease the pain_______ ice or cold water packs. WITH 

8.       The victim should drink a cup_______ tea when reviving. OF

9.       Your flowers will really help to cheer me_______. UP

10.  I’ll phone you_______ Saturday afternoon. ON

11.  Calm _______. Could you please tell me what happened? DOWN

12.  The hospital will send an ambulance to the scene _______10 minutes. IN

13.  Thank you very much _______the present you sent to me. FOR

14.  Will you come to my house _______the weekend? AT

15.  Although her legs were broken, she can go _______work. TO

16.  You must get _______early so as not to be late _______school.    UP....FOR

17.  Because of the heavy rain, we didn’t want go _______last night. OUT

18.  Remember not to overheat the victim _______blankets or coats. OF

19.  It’s very kind _______ you to help me. OF

20.  Mai is standing _______the chair next _______the table. ON...TO

2 tháng 3 2020

Chọn đáp án A

2 tháng 3 2020

A.because

2 tháng 3 2020

ab(b - a) - bc(b - c) - ac(c - a)

= ab2 - a2b - b2c +  bc2 + ac(a - c)

= b2(a - c) - b(a2 - c2) + ac(a - c)

= b2(a - c) - b(a - c)(a + c) + ac(a - c)

= (b2 - ab - bc + ac)(a - c)

= [b(b - a) - c(b - a)](a - c)

= (b - c)(b -a)(a - c)