问题

I know it’s normal for such a thing to happen, but we _____ it if we’d been more careful.

A:need have avoided
B:could have avoided
C:will have avoided
D:had avoided

正确答案是：

同类题型

Hearing the story，he looked ．

his bookishness, curiously little is known about the worldview of Gordon Brown, the first British Prime Minister said to be a real intellectual in decades

He spends as much time as he can ____ English every day.

Bill can play _____ violin , but he can’t play _____ chess.

_________, he could continue working in this company now.