问题
The scientist has made quite a few discoveries, ______ of great importance to the whole world.
A:which I think they are
B:which I think are
C:I think which are
D:that I think they are
B:which I think are
C:I think which are
D:that I think they are
正确答案是：
同类题型
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Is there anyone here name isBetty?—- Sorry, I don’t know.
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