－Which is ________ season in Beijing?

－I think it's autumn.

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－If a=3, b=4, what's the answer to the problem, a+2ab+1=?

－The answer is ________.

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There ________ a vase and many magazines on the table.

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－What are you going to do this afternoon?

－I'm going ________.

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Boys and girls, I've something important ________.

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The headmaster ________ a speech tomorrow afternoon.

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－________ has she been a teacher?

－About eight years.

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He didn't go to bed ________ ten p. m.

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Doing exercises is good ________ your health.

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The boy ________ played the piano on the stage yesterday is Mr. Li's son.

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