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
