选择题：It says she has been studying Chinese for three months and _____ for China in a

题目内容：

It says she has been studying Chinese for three months and _____ for China in a month.

A.had been studying; visited; is leaving

B.studied; had visited; will live in

C.has studied; visited; would leave

D.was studying; has visited; leaves

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The fifth-generation computers，with artificial intelligence，( )and perfected now

The fifth-generation computers，with artificial intelligence，( )and perfected now.

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( )in the earth’s crust，the rock may be subjected to temperatures high enough to

( )in the earth’s crust，the rock may be subjected to temperatures high enough to melt it.

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_____ no cause for alarm, the old man went back to his bedroom.

_____ no cause for alarm, the old man went back to his bedroom.

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Well, really _____ now is start learning what to do with this software and read

Well, really _____ now is start learning what to do with this software and read a lot of tutorials,

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