问题

We’ll learn much from this failure, so our suffering and efforts are not ________.

A:in return
B:in vain
C:at random
D:at all costs

正确答案是：

同类题型

_____your help, everything in the room is in good order now.

You should keep away from the crowded places.

Jane was sofor the news of her lost child that she was almost driven .

The teacher told us ____the window in class

下列加横线字用法与例句中加横线字用法不相同的一项是（）例：无案牍之劳形