问题补充:
You should do more instead of sitting at the desk busy doing your .
A. exercise; exercisesB. exercises; exerciseC. exercise; exercise
答案:
解析:句意:你应该做更多的锻炼来取代坐在课桌前忙于做练习题。分析:考查单词exercise作为名词,译为“锻炼”时为不可数名词,但是译为“练习”时为可数名词。因此前句为锻炼,因此用动词的原形;后者为练习,为可数名词,因此用名词复数形式。故选A