单项选择题

The economist’s suggestion for the country was that it ______ on the development of an educational system available to everyone.

A．focused
B．focuses
C．focus
D．would focus
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单项选择题
The criminal ______ finally in a house abandoned for years.
A．has located
B．was located
C．had been located
D．had located
单项选择题
If she ______ you, she would be happy to take two days off and have a good rest.
A．is
B．were
C．was
D．had been
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