The heart is an important organ of circulation, ________ function is to pump blood to all parts of the body.

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He never used to help his sister, ________ ?

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Sam made the cards himself ________ to his friends ________ money .

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She spoke in a whisper ________ the children, but only ________ a lot of misunderstanding.

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—Come in, Peter, I want to show you something.

—Oh, how nice of you. I ________ you ________ to bring me a gift.

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With the help of science and technology, the farmers produced ________ crops in 1997 as the year before.

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Most green vegetables, ________ for too long, will lose their nutrition.

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It was the training that he had as a young man ________ made him such a good engineer.

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Every teacher and every student ________ to obey the school rules.

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Where was it ________ you finished middle school?

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