It is over two years since my brother ______the army.
A. joins
B. joined
C. has joined
D. had joined
正确答案：B
18．答案为B我兄弟参军已经两年多了在句型hisyear(s)since中主句时现在时since从句中的谓语动词用一般过去时
Itisovertwoyearssincemybrother______thearmyAjoin
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