A、  B、  C、  A本句询问对方是否知道贸易博览会的负责人是谁。

What time do you generally take your break?
(A) I had some coffee.
(B) At about 3 o’clock.
(C) With a coworker.

Do you know who’s in charge of the trade fair?
(A) I believe the Hanson Corporation.
(B) Imported textile items.
(C) The fares have increased.