请选择ABC.k'f:F1U:J(x8R2_-L Sam _____to bed at nine every evening.5`,y0]'^+v8O7E1V1g(g1@
A. go5`,y0]'^+v8O7E1V1g(g1@
B. going5`,y0]'^+v8O7E1V1g(g1@
C. goes5`,y0]'^+v8O7E1V1g(g1@