单项选择题

In fact he had done ______ he could to help the poor.

A．what
B．which
C．as
D．all which
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单项选择题
She is very careful. She ______ very few mistakes in her work.
A．does
B．rakes
C．makes
D．gets
单项选择题
By the time Juan gets home, his aunt ______.
A．will leave
B．leaves
C．will have left
D．is leaving
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