问题

It is difficult for any of us to eat better, exercise more, and sleep enough,______ we know we should.

A:because
B:even if
C:unless
D:before

正确答案是：

同类题型

Here is _______ my family.

unken drivers think that they may be lucky to __________ a fine, which maycost their own lives.

The bus came after I _____ for about half an hour

_____–For tow hours.

You have made outstanding contributions to the company—I am sure you ___ get promoted this year