2019学年度人教版选修七Unit3Under the sea Period1Warming up and Pre-reading 课件(13张)
2019学年度人教版选修七Unit3Under the sea Period1Warming up and Pre-reading 课件(13张)第4页

2. We can infer from the 4th paragraph that ____. A. sea can deal with pollution by itself B. the acceptable standard of sea pollution has been changed C. sea pollution is becoming more and more serious D. the surface of sea is rising