一、1-5 BCCBA 6-10 BBCBC 11-15 ACACA
16. Reading 17. book 18. Wednesday
19. playground 20. office
二、21-25 AAACB 26-30 CBBCA
三、31-35 CBBDD 36-40 BCADC
41-45 BDBCB 46-50 DCEAB
四、51-55 BBDAC 56-60 ADCBD
五、61. evenings 62. heard 63. coming 64. If 65. quickly 66. money 67. on 68. prices 69. spend 70. our 71. exciting 72. a 73. means 74. with 75. to 76. doing
77. healthy 78. better 79. of 80. friends
六、参考范文：
Every drop counts! Saving water is very important for all of us. We can’t live without water, and there is not much clean water on our Earth.
We can do small but useful things every day. For example, turn off the tap quickly after washing hands; take short showers instead of long baths. Also, we should tell our family and friends to save water together.
It’s also a good habit to reuse water in our daily life. For example, we use the water from washing vegetables to water flowers. Let’s start saving water right now!
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