----Why? Tom, your shirt is so dirty?----Mom, I my store room downstairs.A. cleaned B. have cleaned C. was cleaning D. have been cleaning 【查看更多】

 

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----Why? Tom, your shirt is so dirty?

----Mom, I____ my store room downstairs.

A. cleaned      B. have cleaned      C. was cleaning  D. have been cleaning

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1-5 DBDBD   6-10 BBACD   11-15 DBCDA

 


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