Mr. Han is very old and he can’t______himself. So he lives with his children now.

A．look at

B．look after

C．look like

D．look for

旅游行政管理部门自收到设立旅行社经营出境旅游业务申请之日起（）内，作出许可或不许可的决定，并通知申请人。

A.15个工作日

B.20个工作日

C.30个工作日

D.60个工作日