Câu hỏi: Oxygen, fuel, and hear are all necessary _____ combustion.

A. with

B. for

C. about

D. in

Câu 1: Is the United States the wealthiest country ______ the world?

A. to

B. in

C. for

D. of

Câu 2: Many vegetables, including tomatoes, and corn, are native ______ the New World.

A. for

B. to

C. about

D. upon

Câu 3: Will this office be adequate ____ your company's need?

A. on

B. for

C. to

D. with

Câu 4: When ______ Rome do as the Romans do.

A. with

B. for

C. in

D. like

Câu 5: Were you aware _____ the regulations against smoking in this area?

A. in

B. with

C. of

D. about

Câu 6: This summer, he will be eligible _______ a three week vacation.

A. on

B. about

C. of

D. to