A、  B、  C、  B本句是确定金斯伯格先生是否提前预约了的反意疑问句。

Who sent us the registration forms for the seminar?
(A)By the end of June.
(B)I’ll fill them out now.
(C)I think it was Mr. Warner.

Mr. Ginsberg made a reservation, didn’t he?
(A)What about the presidential suite?
(B)I believe so.
(C)Yes, it was well-preserved.