The new airport has been in for two years and it to be a quiet place.A. using; usedB. us

问题补充：

The new airport has been in for two years and it to be a quiet place.

A. using; used

B. use; used

C. used; use

D. useful; use

答案：

A. using; used

(答案→)B. use; used

C. used; use

D. useful; use

解析：be in use 表示使用，used to be adj ，故选B