Though _________ money,his parents managed to send him to university.
A,lacked B,lacking of C,lacking D,lacked in
正确答案是：C ,lacking
这是状语从句的省略：
当从句的主语与主句的主语相同时,被动结构的状语从句,可省略与主句相同的主语和助动词,保留连词+过去分词；主动结构的状语从句,可省略与主句相同的主语和助动词,保留连词+现在分词.
例如：
1.We all know that,if not carefully dealt with,the situation will get worse.
2.Though lacking money,his parents managed to send him to university.
参考：
B 和 C 的区别.lack有两种词性
【动词】用法『lack+sth』例句：He lacks courage.他缺乏勇气
【名词】用法『常与of连用』 例句：There is lack of vegetable.蔬菜紧缺
◎只有在做名词的时候才能用of!