Your mother was angry ______ what you said.   [ ]

A. because      

B. so          

C. because of        

D. so that

一般用（）盛装碱性溶液或浓盐溶液，使用橡皮塞或软木塞。

A、磨口试剂瓶

B、无色试剂瓶

C、棕色试剂瓶

D、非磨口试剂瓶