Unit 4 Environment

　　Phrases and Sentences:

　　1、He is famous for vigorously opposing the use of chemicals to kill pets.

　　PS:解析vigorously opposing 并翻译这句话。

　　==>vigorously opposing积极反对

　　全句翻译：他因为积极反对用化学品杀宠物而出名。

　　2、What would you recommend for a tenth-grader?

　　PS:解析tenth-grader到底是十年级的学生，还是十岁的小孩?