I had to buy a new one.A. My dictionary losingB. My dictionary having been lostC. Becaus

问题补充：

, I had to buy a new one.

A. My dictionary losing

B. My dictionary having been lost

C. Because my dictionary lost

D. My dictionary had been lost

答案：

A. My dictionary losing

(答案→)B. My dictionary having been lost

C. Because my dictionary lost

D. My dictionary had been lost

解析：句意：我的字典丢了，我不得不买个新的。因为两句话之间有逗号，但是没有连词，所以不可能是简单句，D是错的，C项是原因状语从句，但是lose是及物动词，应该是被动，排除C，A项是独立主格结构，但是应该是先丢了字典然后才买个新的，有动作的先后关系的时候，用现在分词的完成式，选B。