二、单项填空 在A、B、C、D四个选项中, 选出可以填入空白处的最佳选项。
(本大题共14分，每小题1分)
1. Emily, _____ 11-year-old girl, can sing _____ pop songs. Her dream is to be a pop singer.
A. a; a number of B. a; the number of
C. an; a number of D. an; the number of
2. The shy girl was asked several questions by the teacher, but she answered _____ of them.
A. all B. both C. none D. some
