单项选择题

Mother does most of ______ at home.

A．clean
B．cleaning
C．to clean
D．the cleaning
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单项选择题
I have no one ______ I can talk upon such matters.
A．to whom
B．whom
C．who
D．that
单项选择题
______ this, they formed a shock team to help complete the work.
A．Hearing of
B．Heard of
C．Hear of
D．Having been heard of
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