单项选择题
A.had sent
B.would send
C.would be sent
D.should be sent
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单项选择题
A.trueB.untrueC.impossibleD.possible
A.true
B.untrue
C.impossible
D.possible
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单项选择题
A.thereforeB.furthermoreC.furtherD.nevertheless
A.therefore
B.furthermore
C.further
D.nevertheless
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