My elder brother _____ the army for three years A.has joined B.has taken part in C.has entered for My elder brother _____ the army for three yearsA.has joinedB.has taken part inC.has entered forD.has been in理由或者解释下

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Myelderbrother_____thearmyforthreeyearsA.hasjoinedB.hastakenpartinC.hasenteredforMyelderbrother_____

My elder brother _____ the army for three years A.has joined B.has taken part in C.has entered for My elder brother _____ the army for three yearsA.has joinedB.has taken part inC.has entered forD.has been in理由或者解释下
My elder brother _____ the army for three years A.has joined B.has taken part in C.has entered for
My elder brother _____ the army for three years
A.has joined
B.has taken part in
C.has entered for
D.has been in
理由或者解释下

My elder brother _____ the army for three years A.has joined B.has taken part in C.has entered for My elder brother _____ the army for three yearsA.has joinedB.has taken part inC.has entered forD.has been in理由或者解释下
D.has been in 表示现在完成式,意思是:我的哥哥已经参军三年了.
in the army 参军

D
join ,take part in ,entere都是短暂性动词,不能与完成时连用,
只有D符合
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D for+时间要求前面动词可延续,ABC都是瞬间动词

A join表加入一个团体,join the army 固定短语