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1. According to the passage, cell phones are especially popular with young people because________.
A. they keep the users alert all the time
B. they make them look more stylish
C. they can not be replaced by regular phones
D. they are indispensable in everyday communications.
2. The word “means” in paragraph 1 most closely means________.
A. meanings B. expression C. transmission D. method.
3. Doctors have tentatively concluded that cell phones may________.
A. change their users’ social behaviors B. change their users’ temperament
C. cause some mental malfunction D. damage their users’ emotions.
4. “Negative publicity” in paragraph 2 most likely means _______.
A. widespread opinion about bad effects of cell phones
B. information on the lethal effects of cell phones
C. the negative public use of cell phones
D. poor ideas about the effects of cell phones.
5. The changes possibly caused by the cell phones are mainly concerned with_______.
A. the smallest units of the brain B. the mobility of the mind and the body.
C. the resident memory. D. the arteries of the brain.
6. The man mentioned in the passage, who used his cell phone too often, _______.
A. had a problem with memory B. abandoned his family
C. suffered serious loss of mental ability. D. could no longer think lucidly.
7. The word “potentially” in the paragraph 4 most closely means_______.
A. certainly B. obviously C. possibly D. privately.
8. According to the passage, what makes mobile phones potentially harmful is_______
A. their radiant light B. their raiding power
C. their power of atraction D. their invisible rays.
9. According to the writer, people should_______
A. keep off mobile phones regularly
B. never use mobile phones in all cases.
C. only use mobile phones in medical emergencies.
D. only use mobile phones in urgent cases.
10. The most suitable tittle for the passage could be _______
A. The Way Mobile Phones work
B. Technological Innovations and Their Price
C. The Reasons Why Mobile Phones Are Popular.
D. Mobile Phones: A Must Of Our Life.
Cho tam giác ABC cân (AB=AC), góc A>90 . Vẽ đường trung trực của các cạnh AB,AC cắt các cạnh này tại M và N và cắt BC lần lượt tại P và Q .a)các tam giác APB và tam giác AQC là tam giác gì.b) gọi O là giao điểm của MP và QN . Chứng minh tam giác AMO=tam giác ANO c) chứng minh O là trực tâm của hai tam giác APB và AQC
Exercise 4. Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions.
Last summer, we decided to spend our vacation at the beach because the weather was very hot in the mountains. The travel agent said that traveling by bus was the cheapest way, but we went by plane because it was faster. We wanted to have more time to spend at the beach. The weather was beautiful, and we had a great time.
1. We decided to go to the beach because______________.
A. it was cheaper than going to the mountains
B. the travel agent said that it was the cheapest
C. of the hot weather in the mountains
D. we wanted to spend time at the beach
2. The bus was the______________ way to travel.
A. best B. easiest C. cheapest D. slowest
3. Traveling by plane was______________ than by bus.
A. more fun B. cheaper C. expensive D. faster
4. We ______________ our vacation.
A. hated B. didn’t like C. enjoyed D. regretted
5. We had very ______________ weather during our vacation. ???
Exercise 2. Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions. Last summer, we decided to spend our vacation at the beach because the weather was very hot in the mountains. The travel agent said that traveling by bus was the cheapest way, but we went by plane because it was faster. We wanted to have more time to spend at the beach. The weather was beautiful, and we had a great time.
1. We decided to go to the beach because______________.
A. it was cheaper than going to the mountains
B. the travel agent said that it was the cheapest
C. of the hot weather in the mountains
D. we wanted to spend time at the beach
2. The bus was the______________ way to travel.
A. best
B. easiest
C. cheapest
D. slowest
3. Traveling by plane was______________ than by bus.
A. more fun
B. cheaper
C. expensive
D. faster
4. We ______________ our vacation.
A. hated
B. didn’t like
C. enjoyed
D. regretted
5. We had very ______________ weather during our vacation.
A. good
B. hot
C. warm
D. cold