单项选择题

I knew I could not finish my homework

A．by he had come
B．until he came
C．when he comes
D．before he comes
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单项选择题
Mr. Holmes called at many schools ______ he lived to ask them to accept his son, but he was refused everywhere for being a black.
A．that
B．around where
C．near which
D．which
单项选择题
One warning was ______ to stop her doing it.
A．suffered
B．sufficed
C．suggested
D．provided
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