Though _______ not to,the girl let out the secret. [ ]

A. telling            

B. was told              

C. to tell                

D. told

工业毒物按物理形态分类可分为（）.

A.气体、蒸汽、烟、雾、粉尘

B.无机毒物、有机毒物

C.刺激性毒物、窒息性毒物

D.物理性毒物、化学性毒物