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

A. in

B. with

C. by

D. over

Câu 1: ……………fax transmission is commonly used in most offices.

A. A

B. An

C. The

D. x

Câu 2: It is possible for local wildlife to coexist ...... industry.

A. to

B. of

C. in

D. with

Câu 3: I don't remember ...... of the decision to change the company policy on vacations. When was it decided?

A. telling

B. being told

C. to tell

D. to be told

Câu 4: The leopard is _________ the threat of extinction.

A. in

B. on

C. under

D. below

Câu 5: Laura reminded her roommate ...... her alarm clock for 6:00.

A. to set

B. setting

C. to be set

D. of setting

Câu 6: A hydroelectric dam ______________ in this area now.

A. is building

B. is being built

C. build

D. was built