问题

The plan was canceled after someonepresented _____ objections to it at the meeting.

A:operative
B:efficient
C:valid
D:secure

正确答案是：

同类题型

. There are ______ months in a year, and the ______ month is December.

___________teachers are there in this school–There are ninety.

This is ______ ruler and that’s ______ eraser.

Your pictures are very nice. — .

Who listens______, Tom, Jack or Bill