1．afford v．负担得起；给予；提供
2．purchase v．& n．购买；购买的东西
3．remain v．保持；依然；留下；剩余
4．strength n．力气；长处
5．volunteer n．志愿者
6．pattern n．式样
7．arrest v．逮捕，拘留
8．breakthrough n．重大进展，进阶
9．evidence n．证据，证明
10．eyesight n．视力；视觉
11．justice n．正义；公正；司法
12．essential adj.必要的；基本的
13．financial adj.财政的；金融的
14．hesitate vi.犹豫，踌躇
15．majority n．多数
16．professional adj.职业的；专业的
17．urgent adj.紧急的；急迫的
18．defend v．防守，捍卫→defence n．保卫；防卫
19．observe vt.观察；注意到；遵守→observation n．观察
20．conclude v．推断出，断定；使结束，终止→conclusion n．结论；结束
21．prohibit v．阻止；禁止→prohibition n．禁止；禁令
22．realize v．实现(目标等)；意识到→reality n．真实，现实
23．relax v．放松；休息→relaxing adj.令人轻松的，令人放松的→relaxed adj.感到松懈的；感到放松的
24．argue vi.争辩， 争论→argument n．争论，辩论
25．assess v．评价，评定(性质、质量)→assessment n．看法，评价
26．protect vt.保护→protection n．保护
1．budget n．预算
2．career n．事业；职业
3．celebrity n．名人
4．consumption n．消费；消耗
5．discourage v．使气馁；阻碍
6．circulate v．传播；流通；循环
7．economically adv.在经济上；节俭地
8．illegal adj.非法的
9．lorry n．(英)运货汽车，卡车
10．pedestrian n．步行者，行人
11．pension n．养老金
12．catastrophe n．灾难，灾祸，不幸事件
13．collision n．碰撞事故
14．eyewitness n．目击证人
15．burglar n．入室窃贼
16．discrimination n．歧视
17．explode v．(使)爆炸
18．alcohol n．含酒精饮料，酒
19．murder vt.谋杀
20．offence n．违法行为，犯罪
21．phenomenon (pl.phenomena) n．现象
22．allocate v．拨给，划归，分配……给
23．confidential adj.机密的，保密的
24．campaign n．运动，战役
25．condemn v．谴责，指责；宣判
26．ecology n．生态，生态学
27．catholic adj.天主教的
28．instructor n．教员，指导老师
29．irresponsible adj.不负责任的；不可靠的
30．massive adj.大量的；巨大的
31．mental adj.心理的；精神的
32．moral adj.道德的；精神上的
33．negative adj.消极的；否定的
34．psychological adj.心理的；心理学的
35．rural adj.农村的，乡下的
36．security n．安全
37．spoilt adj.宠坏的；损坏的
1．He hurried to the airport only to be told that the film star had left.
他匆忙赶到机场，却被告知那位电影明星已经离开了。
2．I tore the box，only to discover that some of the parts were missing.
我撕开盒子，却发现有些零件不见了。
3．They reached the company out of breath，only to learn that they were fired.
他们上气不接下气地赶到公司，结果得知他们被解雇了。
4．He returned home to learn his daughter had just been engaged.
他回家后得知女儿刚刚订婚了。
5．He went to swim in the river nearby，never to come back again.
他去附近的河里游泳，结果再也没有回来。
假如你是李华，你的美国网友David给你写信，询问近年来多次袭击中国华北的雾霾情况。请你给他写封回信，感谢他的关注，简述雾霾的危害并谈谈你的看法。
注意：1.词数100左右；
2．可以适当增加细节，以使行文连贯；
3．开头和结尾已给出，不计入总词数。
参考词汇：雾霾smog
[佳作背诵]
Dear_David,_
I'm_glad_to_receive_your_letter.Thank you for your concern about the heavy smog in North China.Now I'd like to tell you something about it.
Since the winter last year，the smog has occurred a lot of times，bringing much inconvenience to our daily life and done great harm to people's health.Many traffic accidents have happened just because of the heavy smog weather.In addition, quite a lot of flights have to be put off and a great number of people have to stay at home to avoid the poisonous air.Many people have worn masks to protect themselves, only to find that they have suffered from bad coughs，sore throats and other serious diseases caused by the smog.Personally，I think not only the government but also everyone should try to make a difference.I strongly approve of the idea that we can try to drive less and buy environmentallyfriendly products.only when everyone has the awareness can we have cleaner air.
Hoping to hear from you soon.
Yours,_
Li_Hua
