单项选择题

An inspection of the building revealed faults that might __________ have been overlooked.

A．otherwise
B．because
C．therefore
D．however
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单项选择题
Without your timely help, we __________.
A．would not succeed
B．would succeed
C．would have succeeded
D．would not have succeeded
单项选择题
__________ you are blind, you will not miss the astonishing changes taking place in Shanghai.
A．Although
B．If
C．Since
D．Unless
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