(Roger is going to give a report about the driving age in different countries tomorrow. He is talking with his dad now.)
Roger: Guess what, Dad? I found out something interesting today when I   46     my report in the library.
Dad: What is it, son?
Roger: Teenagers in the United States can drive when they are sixteen. In Canada, you can drive at the age of 15. In England, you can get a driving license when you are 17. But in Taiwan, we have to wait   47    . Why eighteen? That’s not fair.
Dad: Well, as a dad, I don’t want my son to start driving at a young age. It’s too dangerous.   48    to take the bus or MRT. Besides, look at the heavy traffic in the morning. Do you still want to drive a car? I know I don’t.
Roger:   49     . But it would be so cool if I could drive at the age of 16. That means   50     next year when I go to high school.
Dad: You know what? More and more people in States are talking about raising the driving age. They want to do so because a lot of teenagers get hurt or are killed on the roads because of speeding or careless driving.
【題組】46.
(A) am preparing
(B) was preparing for
(C) prepare for
(D) have prepared for