单项选择题


A.assures
B.promises
C.guarantees
D.ensures
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单项选择题
A.refusedB.didC.hesitatedD.understood
A.refused
B.did
C.hesitated
D.understood
单项选择题
A.superiorB.inferiorC.cleanestD.dirtiest
A.superior
B.inferior
C.cleanest
D.dirtiest
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