阅读短文，把四个句子填入短文空缺处，然后完成第5小题。 Dear John, I write you a letter and tell you about what the world was like when I was young. __ 1 __. We didn't have telephones when we wanted to talk to our friends. We didn't have e-mail either, so we had to write letters. When we traveled from town to town, we walked or rode horses or took a cart. __ 2 __ Air travel was a dream and we dreamed of being on an airplane but now everyone does. It's so common. Food is another big difference.__ 3 __We would exchange some with people from other towns to buy the things we didn't have. We didn't have a refrigerator so we kept things cool in a special room downstairs. But the biggest difference is electricity. We didn't have any in our town! __ 4 __We didn't have televisions. In summer, we went swimming in the river. Though life was different in the past, we were happy. Yours, Grandma A. Life was very different then. B. At night, we lighted candles and we burned coal or wood to keep warm. C. There weren't any supermarkets so we grew our own food then. D. Later we had buses but very few people had cars. 5. The letter talks mostly about _____. A. what the writer wants to do in the future B. what the life was like in the past C. what John should do differently D. what John hasn't done recently