A、  B、  C、  B本句是确定罗斯先生是否通知了会有更多的人参加研讨会这一消息的否定疑问句。

Are you free to meet on Tuesday, or should we reschedule for later in the week?
(A)Have a seat. It will only take a moment.
(B)I’m available on Tuesday.
(C)I had fun last weekend.

Didn’t Mr. Rose inform you that there would be more people attending the seminar?
(A)I signed up for it yesterday.
(B)Do you know the final headcount?
(C)The entire ballroom.