1 . After listening to his adventure, she felt a strange m_________ of excitement and fear. She felt both excited and frightened at the same time. (根据首字母单词拼写)

2 . What the plants pump through the air is a mixture of chemicals known as volatile organic compounds, VOCs for short. （英译汉）

3 . 词性转换
1. laugh v.笑；发笑→____________________n.笑；笑声
2. lazy adj.懒散的；懒惰的→____________________adv.懒散地；懒惰地→____________________n.懒散；懒惰
3. limit v.限制；限定→____________________adj.有限的
4. major adj.主要的；重要的→____________________n.大部分；大多数
5. manage v.负责；管理；设法做成→____________________n.经理；管理者→____________________n.经营；管理
6. marry v.结婚；嫁；娶→____________________n.婚姻→____________________adj.已婚的
7. mean v.意思是；表示......的意思→____________________n.意义；意思
8. mistake v.弄错；误解→____________________adj.错误；不正确
9. mix v.使混合；搅拌→____________________n.混合物
10. mountain n.高山；山岳→____________________adj.多山的

4 . We listened to the news with a_________________        (mix) of surprise and horror. (所给词的适当形式填空）

5 . I listened to his excuse with a m________ of amusement and disbelief. （根据首字母单词拼写）

6 . 单词拼写
1. 时常，经常 adv.   f___________
2. 形成 v.   f________________________
3. 独立的 adj. i ______________
4. 普通的，平常的 adj.   o____________
5. (大学的）科，系 n.   d______
6. 演讲 n.   l_________________________
7. 交通 n.   t _________________
8. 职业 n.     o_______________________
9. 交换 v.   e_________________
10. 混合物 n.      m___________________

7 . Directions: Complete the following passage by using the -words in the box. Each -word can only be used once. Note that there is one word more than you need.

A. infections     B. factors                 C. particularly          D. separate          E. seriously        F. passive G. mixtures          H. significantly   I. present                       J. negative            K. exposed

Air pollution triggers (引发)more heart attacks than using cocaine and poses as high a risk of sparking a heart attack as alcohol, coffee and physical exertion, scientists said on Thursday. Anger, marijuana (大麻)use and chest or respiratory (与呼吸有关的)     1     can also trigger heart attacks to different extents, the researchers said, but air pollution,       2     in heavy traffic, is the major cause.

The findings, published in The Lancet journal, suggest population-wide       3     like polluted air should be taken more       4     when looking at heart risks, and should be put into context besides higher but relatively rarer risks like drug use. Tim Nawrot of Hasselt University in Belgium, who led the study, said he hoped his findings would also encourage doctors to think more often about population level risks.

Nawrot’s team combined data from thirty-six       5     studies and calculated the relative risk posed by a series of heart attack triggers and their population-attributable fraction (PAF)—in other words the proportion of total heart attacks estimated to have been caused by each trigger. “Of the triggers for heart attack studied, cocaine is the most likely to trigger an event in an individual, but traffic has the greatest population effect as more people are       6     to it,” the researchers wrote. “PAFs give a measure of how much disease would be avoided if the risk was no longer       7    . ”

A report published late last year found that air pollution in many major cities in Asia exceeds the WHO’s air quality guidelines and that poisonous       8     of pollutants result in more than 530,000 earlier deaths a year. While       9     smoking was not included in this study, Nawrot said the effects of secondhand smoke were likely to be similar to that of outdoor air pollution, and noted previous research found that bans on smoking in public places have       10     reduced heart attack rates.

8 . More and more people choose to shop in a supermarket as it offers a great _____ of goods.

A．variety	B．mixture
C．extension	D．combination