单项选择题

To test his theory, the chemist ______ an experiment.

A．set up
B．set out
C．set forth
D．set in
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单项选择题
Professor Jeffrey's lecture on the recycling of waste paper and other garbage will show ______ can still be improved.
A．that the municipal authorities have done
B．how those the municipal authorities have done
C．how what the municipal authorities have done
D．that how the municipal authorities have done
单项选择题
All the references she has obtained for her doctoral dissertation ______ about twenty items.
A．make up for
B．add up to
C．come up with
D．put up with
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