问题

made a discovery, _________ of great importance to the progress of science and technology．

A:I think which is
B:which I think is
C:which I think it
D:which I think it is

正确答案是：

同类题型

GMM’s friend: Just be careful. You may break the antique vase.Guo Meimei: _________? My boyfriend has nothing but money.

I’ve finished writing the novel, ____ is to be published next month.

The new Wanda Plaza has been open!—I’ve got the news.But many people found when they got there,they should first consider their cars.

_____the door, please. —Please come in. The door_____.

It’s easy ________ you to say sorry, but remember __________ be late again.