问题描述：
Could you tell me when_______?It _______since the the chairman came.
A.the talk show will begin,has begun
B.the talk show began,has been on
C.did the talk show begin,had begun
A.the talk show will begin,has begun
B.the talk show began,has been on
C.did the talk show begin,had begun
问题解答：
我来补答展开全文阅读