问题

They have not made any decision on ______they are going to do to deal with the waste and control pollution.

A:that
B:which
C:if
D:what

正确答案是：

同类题型

He was___the important of learning English and began to practise it every day.

_________is the World Cup held —Every 4 years.

ne more favor, please—____ , sir. What’s it then

Look at the photo I took in Jinghong, Yunnan Province. ____ the Dai people were having!—Wow! They were celebrating the Water Festival.

So long a way _____ to go that we started out at 6:00 in the morning.