They have two children. One is a daughter, and ________ is a son.

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The little boy enjoyed ________ at the party yesterday.

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The old man is in trouble. Let's ________ him.

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Do you often ________newspapers in the evening?

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“________ I come in?”“Come in, please.”

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Your teacher often has lunch at school, ________ she?

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They came to China ________ 1997.

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“Is the radio on the desk ________”？“Yes, it's ________.”

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I found ______ difficult to learn maths well.

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“______ we clean the room now?”“No, you needn't.”

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