21. A. attract B. amaze C. offer D. require
22. A. delicate B. promotion C. volcanic D. resources
23. A. figure B. honest C. polite D. happy
24. A. engage B. import C. conserve D. maintain
25. A. original B. responsible C. reasonable D. comparison
26. A. person B. hotel C. signal D. instance
27. A. situation B. appropriate C. informality D. entertainment
28. A. different B. bamboo C. rainfall D. wildlife
29. A. gorilla B. interesting C. September D. opponent
30. A. promote B. precede C. picture D. pollute
31. A. exciting B. impolite C. attention D. attractive
32. A. curious B. receive C. unique D. achieve
33. A. comprehend B. entertain C. develop D. introduce
34. A. consider B. concentrate C. interest D. sacrifice
35. A. pollutant B. graduate C. enjoyable D. suspicious
36. A. generous B. endangered C. horrible D. wonderful
37. A. history B. village C. surprise D. physics
38. A. deafness B. arrange C. absorb D. exhaust
39. A. pressure B. sensible C. treatment D. canal
40. A. publish B. predict C. reply D. refuse
41. A. machine B. export C. chemist D. proceed
42. A. applicant B. preference C. sufficient D. appointment
43. A. interview B. concentrate C. comfortable D. technology
44. A. example B. happiness C. advantage D. disaster
45. A. explain B. involve C. swallow D. control
46. A. character B. guitarist C. astronaut D. bachelor
47. A. surgeon B. conquest C. profit D. canal
48. A. supply B. consist C. happen D. delay
