第20练Unit 3 Save the trees 词汇+能力训练+知识点巩固 -2020-2021学年【补习教材•寒假作业】七年级英语（沪教版）

Unit 3 Save the trees 词汇+能力训练+知识点巩固 例题1单词填空 1. Trees are our good helpers. They help people f against pollution. 2. You should protect your eyes. It is h to read in the sun. 3. Trees p oxygen for us to breathe. 4. I would like to visit you this weekend. When would be a c time for you? 5. If you i something, you think about it and your mind forms a picture or idea of it. 6. I have something important to d_______ with you. 7. We will interview Dr Smith about the lives of trees and their m_____ uses. 8. Mr Li bought a lot of f________ for his new house. 9.The air is a kind of g ________ with no colour and smell. 10. Some animals are in danger. We need to s________ them. 单词填空：1.fight 2.harmful 3.produce 4.convenient 5.imagine 6. discuss 7. major 8.furniture 9. gas 10. save 例题2完成句子 1.我们必须停止浪费水。 We must water. 2.你对地球了解少？ How much do you the Earth? 3.在许多方面我们都有同样的想法. We have the same ideas . 4.妈妈每天进行清扫以保持房间干净整洁. Mum does the cleaning every day to and tidy. 5.确切地说，他不喜欢待在这里 . , he doesn't like to stay here. 完成句子：1.stop wasting 2.know about 3.in many ways 4.keep the room clean 5.In fact 例题3单选题 1. －Listen! Who______ in the room? －Let’s go and see. A. is crying 　　 B. crying　　　 C. cry　　　 D. cries 2. －Who ______ that piano? －My sister, when she has time. A. plays 　　　 B. is playing　　　 C. play 　　 D. playing 3. －Where is your mother, Helen? －She _____ the flowers over there in the garden. A. waters 　　　　 B. water 　　 C. watering 　 D. is watering 4. －Hello! Is that John speaking? －Sorry. This is Henry. John ______ supper. A. cook B. cooks　 C. is cooking D. cooked 5. －Is that your coat sir? －No. Mine _____ over there near the window. A. hangs　　　 B. is hanging 　　 C. hang 　　 D. has hung 6. Look! The workers ______ a new bridge now. The traffic in Changchun will be bet