Câu hỏi: Not all books belong _________this class.

A. in

B. to

C. for

D. at

Câu 1: This organization is quick __________ sending relief goods to the flooded areas.

A. at

B. as

C. up

D. by

Câu 2: When are you leaving __________ Singapore? This week or next week?

A. for

B. to

C. from

D. of

Câu 3: He worked hard ________ a mechanic for ten years before being appointed manager.

A. as

B. at

C. with

D. by

Câu 4: Plant and animal extinction leads _________ loss of biodiversity.

A. on

B. in

C. into

D. to

Câu 5: Governments have enacted laws to protect wildlife ________commercial trade and overhunting.

A. from

B. without

C. for

D. at

Câu 6: Pay attention _______all traffic signs when you are travelling in the street.

A. for

B. on

C. to

D. from