问答题

She had heard strange footsteps in the house several times, so she hired a private detective to______the matter.
A．go into
B．put into
C．look into
D．take into

A.
A．go
B.put
C.look
D.take

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A.
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______and under no circumstances will China be the first to use nuclear weapons.
A．At times
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C．At all times
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A.
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