4．Betty：I was late for school today．
Mum：Why？G（71）
Betty：I took the bus．There was a road accident，and the traffic was very heavy．But nobody was late，except me．E（72）
Mum：It's the most comfortable way，but it's also the most expensive．And taxis are very slow in heavy traffic too．
Betty：B（73）
Mum：That's a good choice，but it's a bit dangerous．There's so much traffic．
Betty：But most of my classmates bikes，and it's quite safe．Don't worry．I'll be careful．
Mum：A（74）
Betty：He lives the farthest from school，so he takes the underground
Mum：And what about Lingling？
Betty：D（75），so she walks．
Mum：How about Daming？
Betty：He goes by bus too，the same as me．But it's so crowded!And the traffic is heavy．
Mum：All right．You can ride your bike to school，but remember to be careful all the time．
A．How does Tony go to school？
B．Then what about going by bike？
C．Does Tony go to school by bike？
D．Her home is the closest to school
E．Maybe I should go to school by taxi．
F．How long does it take to get there？
G．What happened？
