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

A. in

B. for

C. from

D. by

Câu 1: Not all books belong _________this class.

A. in

B. to

C. for

D. at

Câu 2: You should pay more attention __________ what your teacher explains.

A. in

B. at

C. on

D. to

Câu 3: His father used the money he won to set_________ his own company.

A. down

B. up

C. at

D. in

Câu 4: When are you leaving __________ Singapore? This week or next week?

A. for

B. to

C. from

D. of

Câu 5: When you pick _________a book for the first time, check that it is not too difficult.

A. in

B. since

C. on

D. up

Câu 6: 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