With Mr Frank ________ us, I'm sure we'll succeed.

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Having heard a strange sound, he hurried into the room only ________ it empty.

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At the shopping-centre, he didn't know what ________ and ________ with an empty bag.

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A．to buy, leave

B．to be bought, left

C．to buy, left

D．was to buy, leave

What you said ________ interesting.

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________ back made her parents angry and sad.

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When the boy saw his mother, he said “I ________ for glass of water, mum.”

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Among the students one in ten ________ of peasant family.

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The number of smokers ________ fallen ________ 30% this year, compared with last year.

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The flowers need ________.

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What water ________ known to all?

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