单项选择题

Hard as he worked, but Mr. Brown couldn't keep the shop properly.

A．Hard
B．as
C．but
D．keep
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He went to the library and spent the whole afternoon there to look for material for an article on Shakespeare.
A．and
B．to look for
C．material
D．on
单项选择题
One of the things she wrote about were life on a small farm at the beginning of the century.
A．wrote
B．about
C．were
D．beginning
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