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参考答案：
1-5 BCAAD 6-10 BDCAC 11-15 ABBDD 16-20 DBBCA 21-25 BADCC 26-30 FTFFT 31-35 ADBCB 36. passengers 37. standards than
41. inventions most
46. It takes; to 47. allow; to
50. been able to
52. a paper bag
48. get off
49. think of
42. pulling
43. easily
44. stayed up 45.
38. allows
39. environment 40.
51. airplane
53. 它们(河流)在阳光下很耀眼。 54. About two hours.
55. Last summer I took my first airplane flight from Yantai to Xi’an. 56. gets
62. drinking
63. catch
64. choice
65. die
57. quickly
58. swam
59. another
60. found
61. months 66-70 CEADB
One possible version:
My family are going on a trip to Dalian during the summer holidays. How do we get there? Taking a plane is the fastest way to get there, but the plane ticket is very expensive. We can also go there by ship. On the way, we can enjoy the beautiful sea. But it takes too much time. I think the best way to get there is to take a train. It’s cheaper to take a train than to take a plane. And we’ll feel safe and comfortable on it. I’m sure the journey on the train will be a lot of fun.