Câu hỏi: I would like to send these letters …………………..air mail.

A. in

B. with

C. by

D. over

Câu 1: A hydroelectric dam ______________ in this area now.

A. is building

B. is being built

C. build

D. was built

Câu 2: Could you please provide us ……………..some more modern equipment?

A. for

B. by

C. in

D. with

Câu 3: I threw my old trainers and bought some new .................. .

A. ones

B. one

C. some

D. any

Câu 4: The campaign will hopefully ensure the survival ...... the tiger.

A. of

B. for

C. to

D. on

Câu 5: After she ________ hospital, she had a long holiday.

A. leaves

B. is leaving

C. had left

D. has left

Câu 6: She glanced briefly ________ his lapel badge.

A. in

B. on

C. at

D. up