_________we all know, Americans are competitive.
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As
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Which
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What
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That
推荐题目
Jason will never forget about his 18th birthday, saw his being admitted to Harvard.
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when
B
which
C
that
D
it
__________ has already been pointed out, grammar is not a set of dead rules.
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As
B
It
C
That
D
Which
Mark drives his car too fast and, what's more, very carelessly, ________ worries his mother.
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a
B
what
C
it
D
which
Jennifer is always absent from school，＿＿I suppose is why she is blamed now and then.
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which
B
who
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that
D
what
The astronaut did many experiments in the spaceship, ______ much help for knowing space.
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which we think it is
B
which we think are of
C
of which we think are
D
I think which is of