问题

I just don’t understand ________ that prevents so manychildren at school from being as happy as one might expect

A:which
B:when
C:where
D:that

正确答案是：

同类题型

We’ve had three whole weeks without a drop of rain. —True. No crops will _____ if the dry weather continues.

How was you trip last week—_________.

Did you have difficulty finding Ann’house—Not really.She___us clear directions and we were able to find it.easily

The bell _______ the end of the period rang, interrupting our heated discussion.

How is your grandfather now?–Oh, he _______for two weeks