完形填空，阅读下面一段短文，掌握其大意，从每小题所给的A、B、C、D四个选项中，找出可以填入相应空白处的最佳答案。

Driving in China

　　I have been driving cars since I reached the pedals(踏板)．In Canada you 　　1　　 16 to get a driver's license．I 　　2　　 myself to be a very good driver．

　　I visited China 20 years ago．I with my wife was in Shanghai to give a paper at a conference．We 　　3　　 the number of bicycles on the roads and the few cars．In Canada almost each family has one car, but it was 　　4　　 that most Chinese depended on bicycles．

　　I 　　5　　 Shanghai and to other Chinese cities many times since then and have watched the fast changes on the roads．There are far fewer bicycles now but 　　6　　 cars．The roads are crowded, the government has been forced to limit the number of days some cars can 　　7　　 and the traffic jams are almost constant(经常的)．So are the accidents．On a recent visit I saw four or five 　　8　　 within a two-week period．

　　To get a driver's license in Canada, you must drive, with an examiner, on real roads and in real traffic．However, in China you learn on a closed course, 　　9　　 real traffic, get a license and only then are able to drive under real roads．

　　Driving in Canada and driving in China 　　10　　 two different experiences．In Canada there are traffic jams but they aren't so bad．We have more traffic lights; we obey them and drivers are usually 　　11　　 , allowing other cars to cut in front of them knowing it won't make much difference．In China, if you stop 　　12　　 another car cut in front of you will probably be there for a long time because once one car gets in, dozens of 　　13　　 will follow．

　　I would rather 　　14　　 the bus than drive my car in downtown Shanghai and Beijing．Because it's 　　15　　 and stronger than most things that might run into it．

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(11)

(12)

(13)

(14)

(15)