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This is the third time the famous scientist __________ the United States.

A.has been toB.has been in
C.has come toD.has gone

A

解析试题分析:句意:这位著名的科学家已经第三次去过美国了。分析:has been to 是去了已经回来了,Has gone to 是去了还没回来,has been in 指待在某地。句意体现为这位科学家去过之意。故选 A
考点:考查现在完成时的用法。

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