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听力原文:W: Why do we have to finish this proposal tonight? It's already 6 p.m. Can't we c
M: It has to go to the post office before twelve tonight. We must make sure that all the figures are correct.
Q: How many hours at most do they have to finish the proposal?
(18)
A.4 hours.
B.6 hours.
C.12 hours.
D.18 hours.
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