1. - has Tom been to Shanghai? -Twice.2. - is the book? -Ten yuan.3. - is it from your school? -Its five miles.4. - will his mother come back? -In a month.5. - do the Greens go shopping? -Once a week.6. - is your father? -He is eighty years old.7. - did Miss Yang teach Chinese in our school? -About for two years.A. How often B. How many C. How much D. How long E. How far F. How old G. H