This is Tom. He is thirteen. He is from the U.S.A. He is a student. He has a good friend. His name is Bill. Bill is fifteen. He is from Canada. Bill is tall but Tom is short. They are in the same school, but they are in different grades. Tom is in Grade One. Bill is in Grade Two. They go to school(上学) at seven in the morning and go home(回家) at six in the afternoon. 根据短文内容，选择正确的答案。 1. Tom and Bill are ____. A. sisters B. brothers C. teacher and student D. from different countries(国家) 2. Tom and Bill are in ____. A. the same grade B. different grades C. the same color D. the same family(家庭) 3. Bill is  ____. A. 12 B. 13 C. 14 D. 15 4. They go home at ____ in the afternoon. A. 6:00 B. 7:00 C. 7:30 D. 8:00 5. Tom  is  ____. A. short B. tall C. strong D. big