本题要求用比较级填空：
1. heavier 2. more serious 3. bigger 4. more difficult 5. younger
6. larger 7. longer 8. hotter 9. calmer 10. more athletic
六、
1. often, visits, three, four times
2. same as, outgoing
3. clean, classroom
4. good at swimming
5. look the same
1. often, 每月拜访祖父母3到4次,表示频度用how often. 第一句中动词是does, 时态应该一致．
2. the same as和．．．．．．相同，是固定短语．
4. be good at 擅长于．．．．．．, at 是介词，后接动名词．
5. look the same 看上去一样，是固定短语．
七、
Yesterday on my way home I met a classmate of mine. We were in a primary school two years ago. Her name is Zhou Yan. I found she was much taller than before. She told me that she liked playing tennis. She was on the school team and she was very poplar in her school. So she looked more athletic than before. Then she told me that she studied well in her class. All her classmates and teachers said she was very intellectual. We talked for a long time. We talked a lot. She told me a lot of funny stories of her. I thought she was more outgoing and polite than before. At last we decided that we would play tennis together next Sunday.