单项选择题

A．however
B．therefore
C．though
D．thereby
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单项选择题
A．fadeB．vanishC．surviveD．exist
A．fade
B．vanish
C．survive
D．exist
单项选择题
A．proposalB．suggestionC．considerationD．appraisal
A．proposal
B．suggestion
C．consideration
D．appraisal
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