◎ 题干
根据句意,用所给单词的适当形式填空。
1. Look, there is a bird _____ (sing) in the tree.
2. The bad air makes my chest hurt and it's difficult for me _____ (breath).
3. They are doing their homework carefully. You'd better not _____ (disturb) them.
4. Litter _____ (influence) the look of our city.
5. It is known that smoking does great _____ (harm) to us.
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“根据句意,用所给单词的适当形式填空。 1. Look, there is a bird _____ (sing) in the tree. 2. The bad air makes my chest hurt and it's difficult for me _____ (b…”主要考查了你对  【名词】【实义动词的单数第三人称形式】【不定式】【分词】【一般现在时】【固定搭配】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。