完形填空。 Helen 's favorite food is chocolate. Her parents and teacher often say that it's 1 for her teeth to eat too much chocolate. But she doesn't believe it. She often puts some chocolate in the milk for breakfast, the juice 2 lunch, even the soup for supper. Her mother has to 3 some chocolate in her bag before she goes to school. Sometimes when her mother goes shopping with her, Helen won't leave the shop 4 her mother buys some chocolate for her. The little girl 5 back from school with a painful(痛苦的) look yesterday afternoon. A tooth hurt and she had nothing. Her mother made some soup for her. But she put some chocolate in it. Her father bought some 6 for her, but she put some chocolate in it, too. Of course it was useless. 7 the next morning her mother took her to see the 8 .The dentist saw there was a cavity(洞) in her bad tooth . So he had to fill(填充) it with something. 'Now, young girl,' said the dentist , 'what kind of filling(填充物) would you like for that tooth ?' ' 9 , please,' answered Helen. The dentist and Helen’s mother both laughed(大笑).The dentist asked Helen to eat fresh fruit and vegetables 10 chocolate. And It’s necessary for Helen to have healthy eating habits. (     )1.A. good (     )2.A. for (     )3.A. get (     )4.A. when (     )5.A. go (     )6.A. medicines (     )7.A. But (     )8.A. doctor (     )9.A. Chocolate (     )10. A. instead B.bad B.with B.put B.if B.came B.pills B.So B.nurse B.Milk B.but C.well C.at C. buy C.until C.returned C.medicine C.And C.dentist C.Fruit C.instead of