He disliked      to wait, and he expected the manager     him at once.

A．being asked; to see

B．to be asked; to see

C．to be asked; seeing

D．being asked; seeing

（2013）在BaSO4饱和溶液中，加入BaCl2，利用同离子效应使BaSO4的溶解度降低，体系中c（SO2-4）的变化是：（）

A.增大

B.减小

C.不变

D.不能确定