—Hi, Tracy, you look tired.

—I am tired, I ________ the living room all day.

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________ the same time, another less expensive kind of pa-per was developed, ________ from the fibres of plants.

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It is believed ________ no one ________ that place.

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But later, people developed a way of printing, ________ rocks.

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Words will ________ if you put the paper into the water.

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The whole book ________ 12 units, ________ two mainly revisions.

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________ they have invented a new way of making paper.

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A．It is believed which

B．It is reported that

C．People believe which

D．People are reported that

Well ________ for his expert advice, he was able to help a great number of people with their affairs.

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Please ________ these sentences together to form an article.

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Let Harry play with your toys as well, Clare, you must learn to ________

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