阅读理解。 Bruce's favorite food is chocolate. His parents and teachers often say that it's bad for his teeth to eat too much chocolate. But he doesn't believe it. He often puts some in the milk for breakfast, the juice for lunch, even the soup for supper. His mother has to put some chocolate in his bag before he goes to school. Sometimes when she goes shopping with him, he doesn't leave the shop until his mother buys some chocolate for him. The little boy came back from school with a painful look yesterday afternoon. A tooth hurt and he had nothing for supper. His mother made some soup for him. He wanted to put some chocolate in it, or he refused to drink it. His mother had to agree. His father bought some medicine for him, but it was of no use. So this morning his mother took him to the dentist. The dentist found that there was a cavity (洞) in his bad tooth. So he had to fill it with something. 'Now, young man,' said the dentist, 'What kind of filling (填充物) would you like for that tooth?' 'Chocolate, please,' answered Bruce. 1. What does Bruce like best? _______________________________________________________ 2. His mother has to put some chocolate in his bag. (改为一般疑问句) ____ his mother ____ to put ____ chocolate in his bag? 3. He doesn't leave the shop until his mother buys some chocolate for him. (改为同义句) He ____ ____ the shop ____ she buys some chocolate for him. 4. What does the word 'refuse' mean in Chinese? _______________________________________________________ 5. What kind of filling would Bruce like for his bad tooth? _______________________________________________________