精选优质文档-倾情为你奉上Unit 13. 1. 努力去做 try to do / try ones best to do 2. 拯救地球 save the earth 3. 河底 the bottom of the river 4. 向扔 throw to / throw at 5. 把扔到里 throw .into 6. 参与 take part in 7. 扫除，清除 clean up 8. 浪费时间 a waste of time / waste time 9. 解决问题 solve the problem / the solutions to the problem 10.
