( )8. Between 1950 and 1990，the world’s population doubled to 5.3 ________. Nearly eighty ________ of these people live in developing，poor nations.
A. billion；percent
B. billion；percentage
C. billions；percentage
D. billions；percent

8. A 【点拨】billion 与基数词搭配时，不用复数形式，故排除 C 和 D；eighty percent 表示 80%。故选 A。

( )9. —________ space travel make people ________ very ill?
—No，it ________.
A. Do；to feel；don’t
B. Does；feel；doesn’t
C. Does；to feel；doesn’t
D. Does；feeling；doesn’t

9. B 【点拨】根据语境和句子结构可知，此处为一般现在时；主语是 space travel，所以一般疑问句需要用助动词 does；make 后接不带 to 的动词不定式作宾补，所以第二空用 feel 的原形形式；一般现在时的一般疑问句的否定回答是“No，主语+助动词+not”。故选 B。

( )10. —________ life on Mars?
—I hate it.
A. What do you think
B. How do you like
C. What do you find
D. How do you think

10. B 【点拨】询问某人对某事的看法，可以用句型：“What do you think of...?”和“How do you like/find...?”。故选 B。

四、热点素材 阅读短文，在文中空白处填入1个适当的单词，或用括号内所给单词的正确形式填空。
In China，when you want to travel on a high-speed train，you can now choose a quiet car. The big train company in China has started this on some
　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 train lines， 1 the ones from Beijing to Shanghai，Beijing to Guangzhou，and Chengdu to Chongqing.
You can choose a quiet car when you buy your train ticket on the website 12306.cn 2 can offer train tickets. You can ask for a quiet seat in the 3 (two) class(等级). On the 12306 phone app，if a train has a quiet car，you 4 (find) a “quiet” sign.
After you buy your ticket，you will receive 5 message telling you not to make any noise in the quiet car. You should use headphones when 6 (listen) to music and go outside the quiet car if you talk on the phone. Parents must make sure that their 7 (child) behave well so that they won’t cause any trouble for others. The conductors(列车员) will speak more 8 (soft). They also know when each person will get off the train and can tell 9 (they) quietly.
If you would like 10 (buy) some food，you can scan(扫描) a special code on the arm of your seat. Follow the steps to order，and the salesperson will bring it to you.
Now，you can enjoy a nice and quiet train trip!
1. ____________ 2. ____________ 3. ____________ 4. ____________ 5. ____________
6. ____________ 7. ____________ 8. ____________ 9. ____________ 10. ____________

1. including 2. which/that 3. second 4. will find
5. a 6. listening 7. children 8. softly 9. them
10. to buy