请选择ABC-q2I7m2a)n/X2X'^Listen! Xiaoling ________ in her classroom.:\0w9G9?3D1A4Q.h;f
A. sings:\0w9G9?3D1A4Q.h;f
B. singing:\0w9G9?3D1A4Q.h;f
C. is singing:\0w9G9?3D1A4Q.h;f