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

解析試題分析：句意：這位著名的科學(xué)家已經(jīng)第三次去過美國了。分析：has been to 是去了已經(jīng)回來了，Has gone to 是去了還沒回來，has been in 指待在某地。句意體現(xiàn)為這位科學(xué)家去過之意。故選 A
考點(diǎn)：考查現(xiàn)在完成時的用法。

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