I           sooner but I didn’t know that they were waiting for me.

A．had come

B．was coming

C．would come

D．would have come

以中毒性白内障为中毒常见特征性体征的毒物是（）

A.三硝基甲苯

B.二甲苯

C.二氯乙烷

D.正己烷

E.二硫化碳