Tom is a little boy, and he is only1 seven years2 old. Once3 he goes to a cinema4. It is the first5 time for him to do that. He buys6 a ticket8 and goes in. But after two or three minutes9 he comes out, and buys the second10 ticket and goes in again11. After a few12 minutes he comes out again and buys the third13 ticket. Two or three minutes after that he comes out and asks for another14 ticket. But a girl asks him, "Why do you buy7 so many tickets15? How many friends16 do you meet17?" "No, I...