题目内容

【题目】填空

1. He is standing ______ a chair.

2. He is cleaning ______ window.

3. Sally is ______ (clean) the window.

4. It _____ (be) Friday.

5. Let’s _____ (clean) our classroom.

【答案】1. on 2. the 3. cleaning 4. is 5. clean

【解析】

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