—Doyouknowsoundtravelsveryfast

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—Do you know sound travels very fast?
　一Yes. But light travels _________ sound.

A． much faster than	B．a little faster than
C．as fast as	D．slower than

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Ann often helps me________math after school．

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—Why not________your teacher for help when you can’t finish________the story by yourself．

A．to ask：write

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