问题

possible means _____ to prevent the airpollution, but the sky is still not clear

A:involved
B:involving
C:toinvolve
D:being involved

正确答案是：

同类题型

ask me to goo with him, ________

The police came in __________ the thief attempted to rush out of thestore.

It being Sunday, I ______ up early this morning, so I stayed in bed until 9 am[ ]

He told me it was the last time that he ____ to the small village to see the child. [ ]

She is sitting in the warm night air with a cold drink in her hand, _______her own thoughts and feelings.