Câu hỏi: Reviewers describe books _______ “hard-to-put-down”, or “hard-to-pick-up-again”.

A. as

B. for

C. into

D. in

Câu 1: 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 2: Pay attention _______all traffic signs when you are travelling in the street.

A. for

B. on

C. to

D. from

Câu 3: He didn’t even have the intelligence to call _________ an ambulance.

A. to

B. for

C. by

D. with

Câu 4: Vietnam carried _________an intensive program for its athletics, which included training in facilities, both home and abroad.

A. for

B. at

C. out

D. of

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: You should pay more attention __________ what your teacher explains.

A. in

B. at

C. on

D. to