My cousin went to Canada two years ago. He ____ there for a few months and then went to America.

A．worked

B．would work

C．would be working

D．has been working

生理性黄疸出现的时间是（）。

A．产后2～3天 

B．产后4天 

C．产后3～7天 

D．产后10～14天 

E．产后2～3周