The scientist has made quite a few discoveries, ______ of great importance to the whole world.
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A
which I think they are
B
which I think are
C
I think which are
D
that I think they are
推荐题目
No sooner _____ back to the kitchen than the doorbell rang.
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A
got I
B
I had got
C
had I got
D
I did get
How long do you think         the computer company brings out a new product?
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A
it will be before
B
will it be until
C
will it be when
D
it will be that
At first, my new surroundings were difficult _________
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A
to be tolerated
B
tolerating
C
to tolerate
D
being tolerated