49. A. marks　 B. sights C. scenes D. signs

48. A. can　 B. need C. will D. must

47. A. includes B. to include　 C. including D. included

46. A. social B. ordinary C. good D. personal

45. A. make sure B. remember C. expect D. check out

44. A. that　 B. very　 C. quite D. not

43. A. own　 B. owe　 C. share　 D. spare

42. A. remained　 B. left　 C. kept D. stayed

41. A. hearts　 B. thoughts C. actions　 D. minds

40. A. no　 B. some　 C. any　 D. none