练习册

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    题目列表(包括答案和解析)

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    4. They _____ working now.

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    3. Children _____ playing in the playground.

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    2. The eagle _____ flying in the sky.

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    1. He _____ drinking water.

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    10. 我们在唱歌。We are _____ now.

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    9. 看！Cindy来了。Look, Cindy is ______.

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    8. 他正在写信。He is _____ a letter.

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    7. Jerry在喝柠檬果汁。 Jerry is _____ lemon juice.

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    6. 我妈妈正在做饭。 My mother is _____.

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    5. 我在做作业。I am _____ my homework.

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