There was a terrible noise ________ the sudden burst of light.

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The secretary worked all night long, ________ a long speech for the president.

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You’re saying that everyone should be equal, and this is ________ I disagree.

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I haven’t had ________ since this morning.

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He was slowly ________ to death if there was no treatment at once.

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Unless _______ to speak, you should remain silent at the conference.

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Because he was too young, he was prevented ________ out alone.

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The experiment _______ on the moon in July, 1971 proved that Galileo's theory of falling objects _______ true.

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The boy wanted to ride his bicycle in the street, but his mother told him________.

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The first textbooks ________ for teaching English as a foreign language came out in the 16th century.

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