人教版九年级下册英语Unit 13 Section A（3a-4c）课时练详细解答过程和答案
课前自主预习第Ⅰ题详细解答过程和答案1．take part in 2．turn off
3．pay for 4．the food chain
5． take action 6．public transportation
7．听说 8．处于危险中
课前自主预习第Ⅱ题详细解答过程和答案
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课堂合作探究要点突破详细解答过程和答案
1．[对点训练]①B ②take an active part in; join us
2．[对点训练]①A ②afford to pay
3．[对点训练]①B ②A
课堂合作探究语法聚焦第1题详细解答过程和答案
[对点训练]
①will be planted
②must be handed
课堂合作探究语法聚焦第2题详细解答过程和答案
[对点训练]
①Has; watched
②haven't had
课堂合作探究达标检测第Ⅰ题详细解答过程和答案
1． polluted
2．harmful
3．methods
4．reusable
5． laws
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