摘要：They came out for their morning exercises.I also . A.joined B.took part in C. joined in D.attended 解析:join 后面直接加名词意为加入某个组织并成为其中的一员.join 后面加上介词in后再加名词意思为参加某个活动.等同于take part in.但两者有区别.Join in 后面可以不加名词.但是take part in 后面必须得加.所以不选B.而选C.另外attend 是参加某个会议. 答案:C

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