21. A. past B. went in C. went on D. past on

　　22. A. several B. double C. any D. single

　　23. A. personal B. personnel C. person D. personality

　　24. A. all B. both C. whole D. entirely

　　25. A. turn B. way C. saying D. right

　　26. A. chance B. change C. charge D. choice

　　27. A. why B. when C. what D. that

　　28. A. still B. noisy C. empty D. crowded

　　29. A. others B. the other C. another D. other

　　30. A. wet B. dry C. clean D. amazing

　　31. A. realized B. recognized C. rewrote D. recalled

　　32. A. which B. what C. when D. why

　　33. A. escaped B. flowed C. memorized D. told

　　34. A. especially B. specially C. even D. ever

　　35. A. course B. courage C. custom D. chance

　　36. A. service B. section C. servant D. settlement

　　37. A. eventually B. normally C. importantly D. occasionally

　　38. A. hope B. anger C. kindness D. opening

　　39. A. in B. into C. through D. by

　　40. A. it B. them C. us D. me