He kept yawning in class this morning. That is _____ he stayed up late doing his homework last night.
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why
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—He is eager to try something he has never tried before.—Oh I see. That’s ______he’s different from others.
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when
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where
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how
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what
Part of the reason Charles Dickens loved his own novel, David Copperfield, was ________ it was rather closely modeled on his own life.
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what
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why
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whether
Carl hopes to win the tennis game one day. That is he has been practicing hard.
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why
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how
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The only existing problem is ____ we can find this special wood in the forest in such a short time.
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when
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where
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that
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whether
(2014·安徽马鞍山两校第二次联考)China is developing fast.That’s________I think those of my colleagues who deal with China affairs should visit China.
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because
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why
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when
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how