题目内容
—Alice, do you have any plans for this summer holiday?
—I'm not sure. I _________ volunteer to visit the aged at the Old People's Home.
A.can B.must C.may D.need
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题目内容
—Alice, do you have any plans for this summer holiday?
—I'm not sure. I _________ volunteer to visit the aged at the Old People's Home.
A.can B.must C.may D.need