Câu hỏi: The substance is very toxic. Protective clothing must be worn at all times.

A. Since the substance is very toxic, so protective clothing must be worn at all times.

B. So toxic is the substance that protective clothing must be worn at all times.

C. The substance is such toxic that protective clothing must be worn at all times.

D. The substance is too toxic to wear protective clothing at all times.

Câu 1: When the unemployment rate is high, the crime rate is usually also high.

A. The unemployment rate and the crime rate are both higher.

B. The higher the unemployment rate is, the higher the crime rate is.

C. The unemployment rate is as high as the crime rate.

D. The high rate of unemployment depends on the high rate of crime.

Câu 2: They/ not answer/ phone/ this morning/ so/ must/ out/.

A. They hasn’t answered the phone this morning so they must have been out.

B. They didn’t answer the phone this morning so they must be out.

C. They didn’t answer the phone this morning so they must have gone out.

D. They hasn’t answered the phone this morning so they must go out.

Câu 3: Sam doesn’t find it difficult to get up early in the morning.

A. Sam is in two minds about getting up early in the morning.

B. Sam is not hesitant to get up early in the morning.

C. Sam is accustomed to getting up early in the morning.

D. Sam is pleased with getting up early in the morning.

Câu 4: The government knows the extent of the problem. The government needs to take action soon.

A. The government knows the extent of the problem whereas it needs to take action soon.

B. The government knows the extent of the problem so that it needs to take action soon.

C. Knowing the extent of the problem, the government needs to take action soon.

D. The government knows the extent of the problem, or else it needs to take action soon.

Câu 5: "I have never been to Russia. I think I shall go there next year.” said Bill.

A. Bill said that he had never been to Russia and he thought he would go there the next year.

B. Bill said that he would have never been to Russia and he thinks he would go there the next year.

C. Bill said that he had never been to Russia and he thinks he will go there the next year.

D. Bill said that he has never been to Russia and he thinks he would go there the next year.

Câu 6: They were exposed to biased information, so they didn't know the true story.

A. If they got unbiased information, they could know the true story.

B. If they had unbiased the information, they could have known the true story.

C. If they had been exposed to unbiased information, they would have known the true story.

D. If they have exposed to the unbiased information, they could have seen the true story.