单项选择题

I really don't know ______ about it.

A． what to do
B． how to do
C． to do what
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单项选择题
What would you like to ______ us about your hometown
A． speak
B． talk
C． tell
单项选择题
The old woman kept one black dog and two white ______.
A． one
B． ones
C． those
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