人教版八年级下册英语Unit 7 Section B（3a—Self Check）课时练答案
1课前自主预习第Ⅰ题答案
1．protection
2．dangerous
3．stronger
4．highest
5．pollution
2课前自主预习第Ⅱ题答案
1．catch; for
2．stop putting; into
3．protect; from
4．many times more
3课堂合作探究写作指导答案
略
4课堂合作探究达标检测第Ⅰ题答案
1．protection
2．eating
3．Humans
4．fewer
5．harder
5课堂合作探究达标检测第Ⅱ题答案
