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

A. in

B. with

C. by

D. over

Câu 1: The two children blamed each other ...... the window.

A. to break

B. breaking

C. for breaking

D. having broken

Câu 2: Laura reminded her roommate ...... her alarm clock for 6:00.

A. to set

B. setting

C. to be set

D. of setting

Câu 3: The campaign will hopefully ensure the survival ...... the tiger.

A. of

B. for

C. to

D. on

Câu 4: After she ________ hospital, she had a long holiday.

A. leaves

B. is leaving

C. had left

D. has left

Câu 5: I threw my old trainers and bought some new .................. .

A. ones

B. one

C. some

D. any

Câu 6: ……………fax transmission is commonly used in most offices.

A. A

B. An

C. The

D. x