单项选择题

He didn' t know I was in his office. He was too busy to ______ me.

A. pay attention to
B. notice
C. know
D. realize
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单项选择题
I can't keep ______ the teacher who speaks so fast.
A. up
B. up with
C. with
D. on with
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
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