单项选择题

A.since
B.on
C.in
D.at
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单项选择题
A.envelopB.accomplishC.envelopingD.accomplishing
A.envelop
B.accomplish
C.enveloping
D.accomplishing
单项选择题
A.haveB.to haveC.hasD.to has
A.have
B.to have
C.has
D.to has
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