Câu hỏi: Toxic chemicals in the air and land have also driven many species ______ the verge of extinction.

A. of

B. about

C. at

D. to

Câu 1: Plant and animal extinction leads _________ loss of biodiversity.

A. on

B. in

C. into

D. to

Câu 2: A beautiful clock was given _________ her by a handsome boy.

A. down

B. up

C. to

D. with

Câu 3: Governments have enacted laws to protect wildlife ________commercial trade and overhunting.

A. from

B. without

C. for

D. at

Câu 4: He worked hard ________ a mechanic for ten years before being appointed manager.

A. as

B. at

C. with

D. by

Câu 5: They held a party to congratulate _______ their son’s success to become an engineer.

A. on

B. in

C. to

D. up

Câu 6: This organization is quick __________ sending relief goods to the flooded areas.

A. at

B. as

C. up

D. by