Câu hỏi: By the mid-nineteenth century, land was such expensive in large cities that architects began to conserve space by designing skyscrapers.

A. By the mid-nineteenth century

B. such expensive

C. conserve

D. by designing

Câu 1: There are much kinds of books in my school library,but readers cannot borrow them.

A. are

B. much

C. in

D. cannot

Câu 2: 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 3: 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 4: By the time the police come the robber had run away.

A. By the time

B. the

C. come

D. had run

Câu 5: 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

Câu 6: Today the number of people enjoying winter sports are almost double that of twenty years ago.

A. of

B. enjoying

C. are

D. that