Câu hỏi: 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 1: 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 2: The workers went on strikes because of they thought their wages were low.

A. on

B. because of

C. thought

D. were

Câu 3: Increasing involvement in agriculture by large corporations has resulted in what is known as agribusiness-that is, agriculture with business techniques, including heavy capitalization, specialization of production, and to control all stages of the operation.

A. by large corporations

B. has resulted in

C. known as

D. to control

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

A. enough

B. would have travelled

C. the

D. world

Câu 6: By the time the police come the robber had run away.

A. By the time

B. the

C. come

D. had run