You should do more. Don’t always sit at the desk busy doing your.

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问题 You should do more________. Don’t always sit at the desk busy doing your________.

选项 A、exercise; exercises
B、exercises; exercise
C、exercises; exercises
D、exercise; exercise

答案A

解析考查名词单复数。句意：你应该多做运动。不要总是坐在书桌前忙于做练习。exercise作“锻炼”讲时，是不可数名词，因此不加s；作“练习 (题) ”讲时，是可数名词，因此用复数形式exercises。故本题选A。

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中学英语

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