(2013·江西南昌一模)It hasn't been made clear ________ the new underground line is to be open to traffic.
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when
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that
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what
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where
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Believe it or not, I’m sure that is _____ people call the six sense．
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when
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what
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which
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why
The girl _____ leg was broken in the earthquake was taken to the hospital.
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who
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that
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you know your potential, you have to rely on many other people to get to where you are.
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Since
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If
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While
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Once
The American economy is still in trouble，________ the Chinese economy is beginning to pick up.
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when
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however
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Sometimes,________ we show our gratitude for a person is reflected in the kind of food we serve him or her.
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when
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whether
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why
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how