-How clean the classroom is!--Yes.I am sure that Amy it．( )A．is cleaningB．was cleaningC．has cleanedD．had cleaned 题目和参考答案——青夏教育精英家教网——

题目内容

15．-How clean the classroom is!
--Yes，I am sure that Amy ______ it．（　　）

A．

is cleaning

B．

was cleaning

C．

has cleaned

D．

had cleaned

分析 -这个房间多干净啊!
-是啊，我确定艾米已经打扫过它．

解答答案：C
根据How clean the classroom is!可知，"教室很干净，说明已经打扫了"，强调对于现在造成的影响，应该用现在完成时态；现在完成时态的结构为have/has+动词的过去分词；又因为主语是Amy，所以助动词应该用has，故选C．

点评本题主要考查现在完成时，用法：表示过去发生或完成的动作对现在造成的影响或结果，还表示过去发生动作一直持续到现在．其结构是have/has+及物动词的过去分词．

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