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        1. Robert is away. He _______ America since last week.

          A.has been to B.has joined a club in
          C.has studied in D.has become a manager in

          C

          解析試題分析:句意:Robert走了。他從上個星期開始就在美國學(xué)習(xí)了。時間狀語是since last week,因此要選延續(xù)性動詞。Have beem to“表示去哪后并已回來了”;join和become都是點動詞,故選C。
          考點:考查現(xiàn)在完成時的用法。

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