We can see a lot of traffic signs on the _________ . Some signs tell the drivers _________ to do, others tell them what not to do. Every traffic sign has _________ meaning. It's _________ for us to know some traffic signs. Do you see the sign “P”? Do you _________ its meaning? In big cities, there are _________ cars, trucks and buses. The drivers can't _________ their cars on the streets everywhere. If a driver wants to stop his car, he must find a _________ for his car. “P” is the first letter of the word “Park” and it means “You can stop your car here.” Different traffic signs have different meanings. For our safety, we _________ know some traffic signs. They are also a part of traffic rules(规则). __________ people must follow the rules.
11. | A．Internet | B．phone | C．paper | D．roads |
12. 13. 14. | A．exciting | B．important | C．happy | D．nervous |
15. | A．read | B．look at | C．draw | D．know |
16. | A．too much | B．a lot | C．too many | D．much too |
17. 18. | A．place | B．room | C．house | D．school |
19. | A．may | B．must | C．mustn't | D．shouldn't |
20.
