In the old days，in London，the smog was very thick. Car and bus drivers 1 to drive very slowly they could 2 see the.road in front of them even during the daytime. People did not like going out in the smog. 3 they had to go out，they wore smog masks over their faces.
In December 1952，a very， 4 dark cloud came down over.London.It was the 5 smog Londoners had ever had. 6 of it was bad factory smoke. Nearly fifty people died in road accidents. But many more people became unhealthy.The smog was very 7 for old people and children.One man said，"The streets were almost 8 because people stayed at home as much as possible.The air was very thick，and you could almost cut it with a knife."
After three weeks，the smog began to 9 .But in the following weeks and months，over 4000 people died as a 10 of the smog.
( )1 A.hurried B.stayed C. had D.minded
( )2. A.already B.easily C.luckily D. hardly
( )3 A.If B.So C.Though D.Whether
( )4. A.thin B.thick C.light D.clear
( )5. A.furthest B.hottest C.worst D.nicest
( )6. A. Much B.Many C.Few D. A few
( )7. A. quiet B.dangerous C.favorite D.weak
( )8. A.busy B.empty C.enjoyable D.dirty
( )9. A.arrive B.shine C.forget D.lift
( )10. A.beginning B.part C.usual D.result