3. A. popular　　　 　B. upset　　　　　 C. special　　　　 D. funny

2. A. modestly　　 　B. naturally　　　　 C. inaccurately　 D. inappropriately

1. A. scolded　　　 B. wondered　　　 C. realized　　　 D. learned

75. A 主旨大意题。本文作者说明人们从日常生活的细节做起，从自己家庭开始，一 点一滴着手保护环境，故本题选A。

基础写作

[参考范文]

I Want to Smile 　

　　 Smiling plays a vital role in our daily life, for it can not only make us happy, but also please others. If we smile at life, life will smile on us in return, so I want to smile whenever and wherever possible. First, I would like to smile at my parents because they have given me life, take all the trouble to bring me up and arrange almost everything for me, without whose help, I couldn’t have made great progress. Then my smile should go to myself, for only in this way can I gain more confidence in smiling my troubles away and live a better life. In a word, let’s greet every day with a smile.

74. B 推理判断题。根据最后一自然段大意可知本题选B。

73. C 词义猜测题。根据后一句的such as the melting(融化)of the ice sheets in Greenland or West Antarctica.可知tipping points的意思是：融点，选C。

72. B 推理判断题。由第二自然段的第一句可知本题选B。

71. D 细节判断题。由文中所介绍的辨别方向的办法可知这种方法简单易行，也很实用，选D。

　　 　　　　　　　　　　　　　E

为了保护环境，为了减少温室气体的排放量，作者号召我们从自己做起，从日常生活的细节着手，降低二氧化碳的排放量。

70. A 推理判断题。由文章介绍的辨别方向的步骤可知本题A项正确。

69. B 推理判断题。根据文章第二自然段大意可知本题选B。