1. look after照顾，照料　 2. look around/about四处看看，四下环顾　 3. look forward to 盼望，期待 4. look on　 旁观，观望　 5. look on ... as ...　　 把...看作...　 6. look out 当心，小心，留神 7. look out　 警惕　 8. look through　 浏览，翻阅，温习　 9. look through　 仔细查看 10. look up　 查寻，查阅　 11. look up　 仰视　

KNOWLEDGE IS POWER 知识就是力量

如果我们没有知识，我们就不能成功地做任何事情。为什么？因为知识就是力量。凭借知识我们征服了大自然，并且发明了轮船、火车与飞机。我们能用电报传递消息。我们能用电话和朋友谈话。

众所周知，我们学生都是国家未来的主人翁。她非常需要我们。如果我们不努力去获得知识，将来如何来报效她呢？

With the (31) ____________ (develop) of industry, air pollution is getting more and more serious. In Beijing, many people suffer different kinds of illnesses because (32) ___________ air pollution.

Air pollution is caused by the following (33) _________: About half of the problem is caused by vehicles. There are more and more cars, buses on the roads, and they give off (34) __________ (poison) gases. 25% of air pollution is caused by factories. Another factor is the smokers. Smoking not only does harm to their health (35) __________ to others. (36) _________ these, about 10% of air pollution is caused by other reasons.

We should take some measures to fight (37) ____________ pollution. New fuel can be used to take (38) ___________ place of gas. We can plant more trees. If everybody realizes the (39) ___________(important) of environment and does something to stop pollution, the problem will (40) ____________ (solve).

7. 昨天要不是雨下得很大的话, 我们会组织一场足球赛.

4. If I were you... I would... 如果我是你……，我就会……。

如果我是你，我就会改掉这个坏习惯。 5. If only...! 真希望……!若是……那该多好啊! 　要是她接受我的邀请该多好啊1 6. 要不是他伸出援手的话, 我可能上不了大学. (But for…)

3. 我正要打个电话, 这时电话铃响了.(be about to do…when…)

2. 铃一响, 学生们一个接一个地走出教室.(No sooner...than/Hardly…when…)