单项选择题

The scientist ______ most of his experiments if he had not run short of his fund.

A．would finish
B．had finished
C．would have finished
D．ought to have finished
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单项选择题
Some of the national heroes would ______ some principle all their lives.
A．follow
B．take
C．carry
D．serve
单项选择题
Another natural ______ that contributes to the welfare of tile country is water.
A．source
B．mineral
C．power
D．resource
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