阅读短文，选择填空，并把对应的字母标号写在横线上。

We have many changes in our daily life. We wrote letters to our friends in the past, but now we can call them or send them emails. Students went to school on foot before. Nowadays, many students go to school by subway or by car. We listened to the radio before, but now we often watch TV. It's interesting. We lived in small and bad houses many years ago. But now, we live in tall buildings and live more comfortably. We have pretty clothes now. But we didn't have lots of beautiful clothes before. We have a happy life.