听力原文:M: Operator, I'm trying to call 8324,531. But I couldn't get through and it was in service only an hour ago. W: I am sorry, but that number is no longer in service. Q: Why is the man not satisfied with the operator's explanation? (19)
A.
He completed a call to that number only a short time ago.
B.
He believes the operator cannot hear him.
C.
He believes the operator does not want him to make the call.
D.
He thinks that the number must have been changed.