Câu hỏi: The workers went on strikes because of they thought their wages were low.

A. on

B. because of

C. thought

D. were

Câu 1: He said that he has done his homework since 7 o'clock.

A. said

B. has done

C. homework

D. since

Câu 2: The US, that is one of the most powerful countries, decided to declare a war to Iraq.

A. that

B. powerful

C. decided

D. a war to

Câu 3: Today the number of people enjoying winter sports are almost double that of twenty years ago.

A. of

B. enjoying

C. are

D. that

Câu 4: Everyday in summer, but especially at the weekends, all kinds of vehicles bring crowds of people to enjoy the various attraction.

A. especially at

B. bring

C. crowds of people

D. various attraction

Câu 5: The threat of being dismissed do not worry me any more because I have started my own business.

A. The

B. being dismissed

C. do not worry

D. my own business

Câu 6: She has disappeared three days ago, and they are still looking for her now.

A. has disappeared

B. and

C. are still

D. for her