“Do you know Jim quarrelled with his brother?”“I don't know_______.”

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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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_______ in thought, he almost ran into the car in front of him.

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_______ up and down the room, a good idea suddenly hit him.

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The secretary worked late into the night, _______along speech for the president.

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I've worked with children before, so I know what _______ in my new job.

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I _______ impossible for _______ to work out the maths problem.

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Plastic is used _______wood today in many ways.

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