________ of money prevented us from finishing the research work this year.

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As ________matter of fact, he has set ________good example to his young brothers.

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Prices of daily goods ________ through a computer can be lower than store prices.

[　　]

If we had followed his plan, we could have done the work better with

________ money and ________ people.

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There's a feeling in me _______ we'll never know what a UFO is--not ever.

[　　]

Five hundred years ago the plague （黑死病） almost wiped ________the population of the island.

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I'll buy you ________ you want for your birthday.

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Not until all the fish died in the river ________ how serious the pollution was.

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A. did the villagers realize

B. the villagers realize

C. the villagers did realize

D. didn't the villagers realize

Only by practising a few hours every day, ________ be able to master the language.

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--I don't think I can walk any further.

-- ________. Let's stop here for a rest.

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