15．Why he didn't come yesterday is unknown．——青夏教育精英家教网——

15．Why he didn't come yesterday is unknown．

14．It's a pitythat we can't go to see the movie on the weekend．

13．Where they will talk about the matter won't make too much difference．In fact it is the attitude not the place that matters．

12．He has madeit clear that the meeting will be held tomorrow morning．

11．What is known to us all is that the 2010Asian Games took place in Guangzhou．

10．We watched，amazed as firebroke out（爆发） on the outside of the spaceship．

9．Water is fundamentalto the development of life．

8．（16）GWe've worked to make their streets and their schools safer，to give them something positive to do after school and before their parents get home．We've worked to teach our children that drugs are dangerous，illegal and wrong．
Today，I want to talk to you about the historic opportunity we now have to protect our nation's children from an even more deadly threat．（17）C Smoking kills more people every day than AIDS，alcohol，car accidents，murders，drugs and fires combined．Nearly 90% of those smokers lit their first cigarette before they turned 18．Consider this：3，000children start to smoke every day illegally，and 1，000of them will die sooner because of it．（18）A For more than five years we've worked to stop our children from smoking before they begin to try，starting a nationwide campaign to educate them about the dangers of smoking to reduce their access to tobacco products，and to restrict tobacco companies from advertising to young people．（19）FThat means if we act now，we have it in our power to stop three million children from smoking and save a million lives as a result．So this is an emergency that needs quick action of all of you．（20）D．

A．This is a national tragedy（悲剧）that every American should help to prevent．
B．We have to educate them about the dangers of smoking．
C．It is smoking that is more terrible than drugs．
D．The quicker action we take，the fewer teen smokers there will be．
E．Compared with other diseases，drugs kill more people every day．
F．If we do these，we'll cut teen smoking by almost half over the next five years．
G．Since I took office，I've done much to protect our children from harm．

7．The results wereconfirmed （证实） by further experiments．

6．Yuan Longpingis quitesatisfiedwithhis life．（对…感到满意）

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