How long ____ the meeting ____?For about ten minutes.

问题描述:

How long ____ the meeting ____?For about ten minutes.
A.did; begin B.has; begun C.has; been on D.has; been

C be on开始的意思
begin不能接一段时间那么been呢,我觉得been on应该是指一些电影之类的。有开始的意思