问题

Today, we’ll discuss a number of cases _______ parents have much difficulty in communicating with their children.

A:where
B:as
C:why
D:which

正确答案是：

同类题型

下列各句文学常识表述有误的一项是（）

I played table tennis for half an hour, which made me_________ [ ]

Our school is so big. We must clean it up as soon as possible.—Don’t worry. ________.

f there is no scientific proof secondhandsmoke causes cancer, there is no reason why nonsmokers should be forced to takethis risk

The box is ________ heavy _________ I can’t carry it.