题目内容：

London was once famous for its fogs. The worst of them ______ on December 4, 1952.   ____ movement in the town came to a stop. It was almost_______ to drive or ride in anything. Many of the_______ were full of cars and buses that moved two miles an hour. Soon, however, the traffic was stopped. Being left by their ______  , the cars and buses stood empty in the streets. Most people had to take underground. But there were _______ many people there that the gates had to be closed. Being caught in the fog, people _____  their way along the walls of houses with one hand, while they put out ______ in front of them so as not to knock against something or somebody.

It was a ______ fog indeed. More sadly, as many as 4,000 people in London lost their    ____ because of the disaster.

1.A. happen    B. happened    C. was happened    D. happens

2.A. All    B. Some    C. No    D. Few

3.A. important    B. possible    C. impossible    D. difficult

4.A. streets    B. shops    C. markets    D. buildings

5.A. drivers    B. teachers    C. shoppers    D. workers

6.A. such    B. so    C. quite    D. too

7.A. saw    B. went    C. felt    D. guessed

8.A. another    B. the others    C. the other    D. other

9.A. terrible    B. surprising    C. sudden    D. frightened

10.A. way    B. money    C. time    D. lives