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: By the time the police come the robber had run away.

A. By the time

B. the

C. come

D. had run

Câu 2: Air pollution, together with littering, are causing many problems in our large, industrial cities today.

A. with

B. are

C. many

D. in our large

Câu 3: His health gets good and better because he does gymnastics regularly.

A. good

B. because

C. does

D. regularly

Câu 4: Many teachers have devoted their lives to teaching therefore teaching is not a well-paid job.

A. devoted

B. lives

C. teaching

D. therefore

Câu 5: Would you mind showing me how working the lift?

A. mind

B. showing

C. how

D. working

Câu 6: If I had enough money, I would have travelled around the world.

A. enough

B. would have travelled

C. the

D. world