人教版新教材单元同步练习 选必三 Unit 3 第一部分 语言知识 PART 1Reading and Thinking I.选用方框内合适的内容并用其正确形式填空（每项限用一次）。 release, ecology, fossil fuel, policy, trend, frequently 1. The oil spill caused terrible damage to the ________ of the coast. 2. The new president is exp...