单项选择题

A.assure
B.ensure
C.guarantee
D.insure
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单项选择题
A.extensiveB.exclusiveC.excessiveD.comprehensive
A.extensive
B.exclusive
C.excessive
D.comprehensive
单项选择题
A.partiesB.groupsC.individualsD.departments
A.parties
B.groups
C.individuals
D.departments
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