单项选择题

If the whole operation ______ beforehand, a great deal of time and money would have been lost.

A. was not planned

B. has not been planned
C. had not been planned

D. were not planned
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单项选择题
We don’t need air conditioning, ______.
A. nor can we afford it

B. and nor we can afford it
C. neither can afford it

D. and we can neither afford it
单项选择题
A survey was carried out on the death rate of new-born babies in that region, ______ were surprising.
A. as results


B. which results
C. the result of it


D. the results of which
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