These days，cars are designed using computers．Let’s look at how a new car is created．
First，several   16  talk about the new car and any good ideas that they have．Then they sit down at their computers and   17  many sketches．The best two or three drawings are chosen and then more detailed drawings of   18  are developed on the computer．You can change the size，shape or color of any part on the computer to see   19  the car would look and then you can choose the best design．
Both the inside and the outside of the car have to be designed．Part of the inside of the car is    20 so that the designers can sit in it．They can feel if there is enough  21 inside and if they can reach  22 ．Then some cars are built-there are more than 15，000 parts of a car to 23 ．
When everything is known to be   24  ，the cars are made in the factory．Again，computers are used to make sure that all the parts are   25  as they are needed．The factory
usually stays open all through the night so that the car production never stops．

These days, cars are designed using computers. Let’s look at how a new car is created.
First, several designers talk about the new car and any good ideas that they have. Then they sit down at their computers and draw many sketches. The best two or three drawings are chosen and then more detailed(细节的，详情的) drawings of cars are developed on the computer. You can change the size, shape or color of any part on the computer to see how the car would look and then (73 ) you can choose the best design.
Both the inside and the (71) ________of the car have to be designed. Part of the inside of the car is built so that the designers can sit in it. They can feel if there is enough room inside and if they can reach everything. Then some cars are built—there are more than 15 000 parts of a car to test.
(74) When everything is safe, the cars are made in the factory. Again, computers are used to make sure that all the parts are ready as they are needed. （72）The factory usually stays open all through the night so that the car production never stops.
【小题1】Fill in the missing word:
“Both the inside and the _____________of the car have to be designed.”
【小题2】The underlined phrase “stays open” means______________________. (Only in English）
【小题3】“You can choose the best design.” means:
The best design can __________  __________.
【小题4】Please translate the following sentence into Chinese:
“When everything is safe, the cars are made in the factory.”
__________________________________________________________________________
【小题5】The main idea of the passage is
____________________________________________________________________.