We all know that tables are made ________ wood while paper is made ________ rice straws.

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________ several times, the young scientist still kept on making his experiments.

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The policeman put down the phone, ________ with a smile on his face.

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－Why was a special meeting called?

－________ a new chairman.

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________ to sunlight for too much time will do harm to one's skin.

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With his son ________, the old man felt unhappy.

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Nearly every great building in Beijing was built ________ south.

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O'Neal works hard. He is often seen ________ heavily before his teammates start.

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________ time and labor, cartoonists generally draw the hands of their characters with only 3 fingers and a thumb.

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________ all my letters, I had a drink and went out.

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