With Halloween approaching, there exists a real concern among parents and teachers __________ trick or treating will become a seriously anti-social activity.
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whether
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what
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that
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how
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(2014·福建部分一级达标学校联考)Life is like a game________you play five balls in the air—work，family，health，friends and spirit.
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when
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that
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which
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where
（2014届江西省重点中学盟校高三第二次联考英语试卷）34. He wrote a long letter ___he explained what had happened in the accident.
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what
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which
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where
D
how
______ this village was extremely poor, they felt it was still important to keep the school going.
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So long as
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Though
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Even as
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As if
The hospital has been set up in ______was a wasteland many years ago.
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which
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that
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where
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what