Bob ______ his bedroom by himself. Look!

问题选择题

Bob ______ his bedroom by himself. Look! How clean it is!

A. sweeps B. swept C. has swept

答案

答案：C

题目分析： have/has+动词过去分词，构成现在完成时，Bob是第三人称单数，用has+过去分词。sweep的过去分词为swept。句意：鲍勃自己打扫了卧室，看，多干净啊！故选C。