參考答案：

26-30 CBCDA? 31-35 BCDBC? 36-40 ADCBA? 41-45 ACDBA

46-47 DB? 48-51 CABA? 52-55 CDDB? 56-60 DDCDB

66. a group of technologies? 67. Cars and trucks.

68. Many new jobs.? 69. Al’s recent developments have got a lot of social attention.

70. 它在許多方面改變著人們的生活和工作方式。

71. busier? 72. an? 73. up? 74. happily? 75. third? 76. why? 77. them? 78. knew

79. classmates? 80. for

Is it hot outside

Remember to arrive on time

What do you have for lunch

Lucy brought me a cup of tea

How beautiful your kites are

略