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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