He used to be afraid of the dark so he used to go to sleep the light . A. with inB. with

问题补充：

He used to be afraid of the dark so he used to go to sleep the light .

A. with , in

B. with , on

C. by , on

D. by , in

答案：

A. with , in

(答案→)B. with , on

C. by , on

D. by , in

解析：with带有,伴随;in在里面;on在上面;by通过某种方式;句意:他过去害怕黑暗,因此他常常开着灯睡觉.结合语境可知前一空用with表示伴随状态,下文on可用作形容词,开着的.故选B.