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
Can you tell me ______ she is waiting for
A．why
B．whose
C．whom
单项选择题
What would you like to ______ us about your hometown
A．speak
B．talk
C．tell
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