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

A. on

B. in

C. to

D. up

Câu 1: Not all books belong _________this class.

A. in

B. to

C. for

D. at

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

A. for

B. to

C. from

D. of

Câu 3: You should pay more attention __________ what your teacher explains.

A. in

B. at

C. on

D. to

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

A. at

B. as

C. up

D. by

Câu 6: Don’t you know what happened _________ the people who went on holiday with us?

A. about

B. to

C. by

D. at