填空 。 Do you like bubble gum (泡泡糖)? Do you know when it was 1 ? In the 1870s, an American discovered bubble gum. 2 name was Thomas Adams. He wanted to find the use of a chicle（一种树胶). Chicle is a Spanish 3 for sticky water that comes from one kind of Mexican tree. Mr Adams wanted to make rubber 4 chicle. He worked in his home while he tried to find a way to make the chicle become stronger. He had a son 5 name was Horatio. He also helped his father now and then. One day, young Horatio began to chew (咀爵) the chicle while he watched his father work. It did not 6 very good, but Horatio enjoyed chewing it. Then the young boy began to blow bubbles with the new chicle-which his father had made. Mr Adams had discovered bubble gum 7 . Mr Adams gave up trying to find a way to make rubber. 8    , he wanted to try to sell the new gum that he had made. He thought 9 people might like the taste, too.He was 10 . Soon, the new gum became more and more popular. (     )1. A. created (     )2. A. Her (     )3. A. word (     )4. A. of (     )5. A. whom (     )6. A. taste (     )7. A. by mistake (     )8. A. Instead of (     )9. A. another (     )10. A. good B. create B. My B. meaning B. from B. which B. sound B. by accident B. Because of B. other B. true C. discovered C. His C. sentence C. with C. whose C. look C. in time C. Instead C. the other C. right