Câu hỏi: He worked hard ________ a mechanic for ten years before being appointed manager.

A. as

B. at

C. with

D. by

Câu 1: Do you know anyone who might be interested _________buying an old car?

A. on

B. in

C. with

D. about

Câu 2: We benefit greatly ____________the medicines and other products that biodiversity provides.

A. from

B. without

C. for

D. at

Câu 3: Maintaining biodiversity is important _______ us in many ways.

A. in

B. for

C. from

D. by

Câu 4: What did that man die ________? –A heart attack.

A. by

B. of

C. with

D. to

Câu 5: This organization is quick __________ sending relief goods to the flooded areas.

A. at

B. as

C. up

D. by

Câu 6: Where is Jimmy? – He is ________ work. He is busy _________ his monthly report.

A. at/ with

B. at/ at

C. at/ to

D. on/ with