单项选择题

I don’t quite follow what she is saying．（）

A．observe
B．understand
C．explain
D．describe

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单项选择题

It took US along time to mend the house（）

A．build
B．destroy
C．design
D．repair

单项选择题

Did anyone call when I was out（）

A．everyone
B．someone
C．nobody
D．anybody

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