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In fact, I wonder _________ my efforts were all in vain.
#30844
A
that
B
which
C
why
D
where
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 Helen has got ________ it takes to be a great tennis player. In other words, she has the potential to become world famous.
#30341
A
how
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what
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when
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 ______  it is getting dark.，we’d better hurry
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A
And
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But
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Danby left word _______he would call again in the afternoon .
#32353
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who
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How long do you suppose it is ___________ he arrived there?
#31461
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when
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before
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after
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Where was ­­­____you met with the famous scientist?
#34656
A
it that
B
it
C
the place
D
there