The two friends ________ on the Internet for three hours, and they would go on till the next morning.

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Mrs. White became a teacher in 1985. She ________ for twenty years by next summer.

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The little boy is dirty from head to foot because he ________ in the mud all morning.

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Come and see me whenever ________.

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--Thank you very much ________ helping me to repair my old computer.

--That's all right. Thanks ________ your letter, I can come in time and repair it for you.

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From July 5 to 28, a team of cyclists ________ as Bikers for the Blind will ride their bikes 1888km from Lijiang.

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Tom cried sadly because his brother and some of his friends had gone swimming ________ him.

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Almost everybody present felt unhappy ________ what he had said.

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We advertised for pupils last autumn, and got______60.

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The ABC company, ________ you visited a manager yesterday, was built in 1988.

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