Even the voices that recite the directions can differ, with better systems like BMW’s and Lexus’s having a wider vocabulary. The instructions are available in French, German, Spanish, Dutch and Italian, as well as English. The driver can also choose parameters for determining the route: fastest, shortest or no freeways(說，高速公路), for example.

　　21. We learn from the passage that navigation computers .

　　A) will greatly promote sales of automobiles B) may help solve potential traffic problems

　　C) are likely to be accepted by more drivers D) will soon be viewed as a symbol of luxury

　　22. With a navigation computer, a driver will easily find the best route to his destination .

　　A) by inputting the exact address B) by indicating the location of his car

　　C) by checking his computer database D) by giving vocal orders to the computer

　　23. Despite their varied designs, navigation computers used in cars .

　　A) are more or less the same price B) provide directions in much the same way

　　C) work on more or less the same principles D) receive instructions from the same satellites

　　24. The navigation computer functions .

　　A) By means of a direction finder and a speed detector

　　B) Basically on satellite signals and a map database

　　C) Mainly through the reception of turn-by-turn directions

　　D) By using a screen to display satellite signals

　　25. The navigation systems in cars like Lexus, BMW and Audi are mentioned to show .

　　A) the immaturity of the new technology

　　B) the superiority of the global positioning system

　　C) the cause of price fluctuations in car equipment

　　D) the different ways of providing guidance to the driver