请选择ABCD5p3I2A'F(`0G,A3p,W1o-N6@It’s too difficult. Why _________ the teacher for help?*y(_)S:I2h*G7T.V
A. not to ask*y(_)S:I2h*G7T.V
B. not asking*y(_)S:I2h*G7T.V
C. don’t ask*y(_)S:I2h*G7T.V
D. not ask*y(_)S:I2h*G7T.V