18. fall (fell/ fallen) down from…= fall off…从…摔下来 /fall over向前摔倒　　 fall into…跌进…

　 feel (felt / felt)

17. drop (dropping/ dropped)　　 drop to 5

16. noise ----noisy ---- noisily

15. anger 愤怒----angry ----angrily　

　 She looked angrily at me. But I didn’t know why she looked so angry.

14. gentle ----gently　 /　 terrible ---- terribly　 /　 possible ---- possibly

13. enter (vt.)= come into/ go into… ---- enter for…报名参加 ----entrance / exit (n.)

12. litter (u.n.)(垃圾)/ little (小, 少) / letter (信)

11. different ----difference(s) (n.)

10. important ----importance (n.)

9. tour ----tourist(s)　

visit (n.) go to …for a visit / a visit to…(v.) visit (a place) ----visitor(s)　

travel (vi) travel to…----travl(l)er(s)