The mother used to ________her son’s pockets while he was asleep, looking for letters from his girlfriend.

A．pick out

B．go through

C．deal with

D．look into

根据中国加入WTO的承诺，中国加入WTO三年内，外国证券公司设立合营公司从事我国证券投资基金管理业务时，外资比例不超过（）。

A．17% 

B．33% 

C．49% 

D．80%