People on the grassland of is now Kazakstan were the first to achieve both riding and milking horses．
#78987
A
where
B
which
C
what
D
as
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---Does anyone know __________? ---I hear that he was born in Sweden.
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what he is
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when he was born
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where he comes from
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which country is he from
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how long it takes to fly to Guilin
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how long it took to fly to Guilin
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how long does it take to fly to Guilin
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how long did it take to fly to Guilin
Could you tell me __________ in the future?
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what will life be like
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what will life like
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what life will be like
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—Morgan, could you tell me _____________?—In the Mexican city of Cancun.
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where did the UN Climate Change Meeting open
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when did the UN Climate Change Meeting open
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when the UN Climate Change Meeting opened
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where the UN Climate Change Meeting opened