his electronic dictionary made himself sad.A. LosingB. LostC. Being lostD. To be lost

问题补充：

his electronic dictionary made himself sad.

A. Losing

B. Lost

C. Being lost

D. To be lost

答案：

(答案→)A. Losing

B. Lost

C. Being lost

D. To be lost

解析： 本句中的losing his electronic dictionary在句中做主语；B项不能做主语，CD两项都使用了被动语态的形式，与句义不符。句义：丢掉他的电子表让他很难过。根据句义说明A正确。