选C
前一句是过去时.后一句是完成时.
意思是"他的妈妈去年入党了,她已经是一年的党员了"
his mother()the party last year.she()a party member for a year
his mother()the party last year.she()a party member for a year
A.joined,was
B.has joined,is
C.joined,has been
D.has joined,has been
A.joined,was
B.has joined,is
C.joined,has been
D.has joined,has been
英语人气：853 ℃时间：2019-08-21 13:16:13
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