Questions 7 to 10 are based on the following passage. At the end of the passage，you will be given 20 seconds to answer the questions.
Now, listen to the passage.
7. How many people died in the violent earthquake that shook Los Angeles in 1994?
A. More than 60 people.
B. At least 25，000 people.
C. Almost 60 people.
D. Almost 25,000 people.
8. Injuries were relatively less in Los Angeles for the following reasons EXCEPT that_____.
A. the quake occurred at 4: 31 am on a holiday
B. traffic was light on the city's highway
C. changes in construction method made buildings more resistant to quakes
D. most people were in the open air
9. The new design of building would install_____, which is a big progress in quake-proof.
A. rubber
B. steel
C. computers
D. radio
10. Which of the following descriptions is INCORRECT?
A. Smart buildings would be very expensive.
B. Smart buildings could save lives.
C. Smart buildings would be more resistant to earthquakes.
D. Smart building would be useless.