单项选择题


A.must
B.should
C.can
D.would
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单项选择题
A.America'sB.the AmericanC.itsD.the U. S.
A.America's
B.the American
C.its
D.the U. S.
单项选择题
A.interestingB.luckyC.learningD.lovely
A.interesting
B.lucky
C.learning
D.lovely
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