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20．Victor and Rick ________ Shanghai on business many times．（　　）

A．

have gone to

B．

have been to

C．

have been in

分析維克特和瑞克去上海出差很多次了．

解答答案：B 根據many times可知，動作已經完成對現在造成一定的影響，所以用現在完成時態，現在完成時態的結構為have/has+動詞的過去分詞，have been to表示"去而歸"，此處表達"去過"；主語是I，所以助動詞用have，故選B．

點評本題主要考查現在完成時，用法：表示過去發生或完成的動作對現在造成的影響或結果，還表示過去發生動作一直持續到現在．其結構是have/has+及物動詞的過去分詞．此題注意have been to"去而歸"和 have gone to"去而未歸"的區別．

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