my mother has been woking in that clothing factory for-A.one and a half year B.one year and a half C.a year and ahalf year 2；he has been collecting stamps____five years ago A.since B.for C.in
问题描述：
my mother has been woking in that clothing factory for-
A.one and a half year B.one year and a half C.a year and ahalf year 2；he has been collecting stamps____five years ago A.since B.for C.in
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