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    will hurt the students’ eyesight. A. Doing plenty of exercises B. Doing plenty of exercise. C. Doing a lot of exercise D. Doing a number of exercise 【查看更多】

     

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    _____ will hurt the students’ eyesight.

      A. Doing plenty of exercises          B. Doing plenty of exercise

      C. Doing a lot of exercise             D. Doing a number of exercise

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