11、My teacher        a paper on how to protect the students’ eyesight last week，but I don’t know whether she has finished it or not.  

A. has written    B. wrote    C. had written     D. was writing  

11、D

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My teacher        a paper on how to protect the students’ eyesight last week，but I don’t know whether she has finished it or not.  

A. has written    B. wrote    C. had written     D. was writing  

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