二、单项填空（共15小题；每小题1分，满分15分）
从每题所给的A、B、C、D四个选项中选出可以填入空白处的最佳选项。
16. Mrs. Smith has ______ 8-year-old daughter who has won two national painting prizes.
A. a B. an C. the D. 不填
17. ______ all his pocket money, Dan bought a present for his mother on Mother’s Day.
A. With B. For C. By D. In
