----- Nội dung dịch tự động từ ảnh ----- 18. Peter enjoys A. collect foreign stamps. B. collecting C. to collect some sports in their free time. C. do 19. Teenagers are advised to B. have A. go 20. My little sister doesn't like crowds A. because B. therefore D. collected D. see she never goes to the supermarket at weekends. D. because of C. but