Thomas _____ the army for two years,so he misses his mother

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Thomas _____ the army for two years,so he misses his mother every day.
A.has joined B.has taken part in C.has been in
应该选哪个选项填空?为什么?

选C
【解析】join和take part in都是瞬间性动词（短语）,用在现在完成时中不能与表示一段时间的状语（for two years 两年）连用.be 为状态性延续性动词则可以.故选C
题意：托马斯参军已两年了,因此他每天都思念着他的母亲.

Thomas _____ the army for two years,so he misses his mother His brother_____ in the army for two years. He ________ the army for ten years. my brother _____ the army for two years.用哪个选择是对的?为什么? 1.He has been in the army for three years?_____ _____three y He once worked in a hotel for two years.So he is a _____ man It _____ ten years since he left the army. It _____ ten years since he left the army . he joined the army 3 years ago he__ ___the army for 3 years. 1.He _____ for two years. he has been in the army for five years He joined the army for five years（改错）