问题

We can’t do well in exams we study hard.
A:if
B:and
C:since
D:unless;
B:and
C:since
D:unless;
正确答案是:
同类题型
Lizzie was______ to see her friend off at the airport
___is very little possibility that the global financial crisis will end in a very short time
In the experiment we kept _____ watchful eye on ______developments and recorded every detail
.. —-She looks so unhappy. Did you tell her the truth yesterday? —-Yes, but I ____ her later.