单项选择题

Linda was______the experiment a month ago but she changed her mind at the last minute.

A．to start
B．to have started
C．to be starting
D．to have been starting
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单项选择题
The research requires more money than ______.
A．have been put in
B．has been put in
C．being put in
D．to be put in
单项选择题
He would have finished his college education, but he ______ to quit and find a job to support his family.
A．had had
B．has
C．had
D．would have
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