The missing boy were last seen ________ basketball on the playground.

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Rather than ________ on a slow bus, he always prefers ________ a bike.

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We set out at 9:00 ________ home at 10:30.

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The Chinese are generally considered ________ printing.

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________ down the radio. I'm doing my homework.

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There was nothing they could do ________.

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How about the two of us ________ a look at the pictures?

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“Can't you see?” he said ________ to the film being shown.

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________ is good for both young and old people.

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________ a reply, I decided to write another letter.

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