问题
Today，we’ll discuss a number of cases ________ parents have much difficulty in communicating with their children.
A:which
B:as
C:why
D:where
B:as
C:why
D:where
正确答案是：
同类题型
The book has been translated into thirty languages since it ______ on the market in 1973
Thank you for _______ let me _______ shopping today.
My favourite song is Friends. It____really beautiful.
What is the book mainly about? — Well, it _____ a little boy who suffered a lot during the war.
It was the boy _____ had been in prison_____ stole the money.