题目内容
Thomas ________ the army for two years,so he misses his mother very much.
A.has joined B.has taken part in C.has been in
A.has joined B.has taken part in C.has been in
C
本题的含义为汤姆斯参军已经2年了,表示时间长度,不可以使用短暂动词join或take part in,可以用be in来表示,故本题选B。
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