Câu hỏi: I write letters _______ my right hand.

A. in

B. by

C. with

D. at

Câu 1: Those books deal mainly_______ tropical plants.

A. with

B. in

C. for

D. up

Câu 2: He congratulated me_______ winning the competition.

A. of

B. on

C. at

D. about

Câu 3: I was disappointed ________ the grade I received on my last essay. 

A. for

B. about

C. to

D. a and b

Câu 4: Jane doesn't spend much money______ clothes.

A. over

B. about

C. at

D. on

Câu 5: He insisted ______ taking us dinner.

A. on

B. in

C. over

D. of

Câu 6: She always takes good care_______ her children.

A. for

B. in

C. of

D. with