----- Nội dung dịch tự động từ ảnh ----- school a few years ago. 20. She A. leave B. leaves C. leaving D. left 21. -I lost my wallet on my way to school this morning. ! You must be careful next time. A. what a pity! B. Excuse me is a serious problem facing mandkind today. B. pollution as my mother. B. better C. take care D. you're welcome 22. Environmental C. polluted A. pollute 23. I can't cook as A. good 24. - "How often do you go to school?" - ' A. I go there early C. I don't think so. 25. The D. polluting C. best D. well B. I go there by bus D. Everyday except Sunday. are those who do not have a job. A. disabled 26. I A. didn't see C. old D. unemployed B. young him since 2012. B. don't see C. haven't seen D. won't see