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    -What a nice classroom! -Yes. It every day. A. is cleaning B. is cleaned C. has cleaned D. must clean 【查看更多】

     

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     —Look! What a nice classroom!      — Yes, it ________ every day.

    A. is cleaning                   B. has cleaned      C. is cleaned

     

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    —What a nice classroom!

    — Yes. It _____ by us every day.

    　　　 　　　 A. is cleaning　 　 B. has cleaned 　 C. must clean　 D. is cleaned

    　

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