单项选择；从A、B、C、D四个选项中选出一个可以填入句中空白处的最佳答案。
It is ________ amazing thing that the little dog can play ______ piano very well.
A. an, \ B. a, a C. an, the D. \, the
单项选择；从A、B、C、D四个选项中选出一个可以填入句中空白处的最佳答案。
It is ________ amazing thing that the little dog can play ______ piano very well.
A. an, \ B. a, a C. an, the D. \, the
C