问题
ed a lot of questions, none of ______was easy to answer.
A:which
B:them
C:what
D:that
B:them
C:what
D:that
正确答案是：
同类题型
a very hard-working student—________As far as I know, he often burns the midnight oil
.Let’s ______ the children into 4 groups.Each group will have a ______ room to sleep in.
Not until he retired from teaching three years ago _______having a holiday abroad .
The teacher tells us ______ the rules next time.
I think you are different now．–of course，times have changed，and ．