大师作文网在线求指导：根据句意,用所给单词
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在线求指导：根据句意,用所给单词
| 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. |
1. singing 2. to breathe 3. disturb 4. influences 5. harm