[填空题]Tom laughed when he (realization) （） what had happened.

My father will blow his top when he sees what happened to the car. The underlined part means （）

When Tom left school, he did not really know what he wanted to do. He first worked in an office, but he found that it was boring. There was also the trouble with his second job in a car factory. He then decided to work out of doors, and got a job as a gardener in a park.
Now he works much harder than he did in the office or in the factory, because his work is more varied. He works the hardest in autumm and winter, keeping the park tidy and preparing for spring and summer. In summer he can relax and he can feel proud that be has helped to make the park so beautiful. Many people visit the park and he is always pleased when he hears them say how lovely it looks.

Who won the World Cup 1994 football game What happened to the United Nations How did the critics (评论家) like the new play (41) an event takes place, newspapers are on the streets (42) the details. Wherever anything happens, reporters are on the spot to (43) the news. Newspapers have one basic (44) to get the news as quickly as possible from its source, from those who make it to those who want to (45) it. Radio, television, and (46) inventions brought competition for newspapers, so did the development of magazines and other means of communication. (47) , this competition merely spurred (促进) the newspapers on. They quickly made use of the newer and faster means of communication to improve the (48) and thus the efficiency of their own operations.
Today more newspapers are (49) and read than ever before. Competition also led newspapers to branch out to many other fields. Besides keeping readers
A. Just when
B. While
C. Soon after
D. Before