A、  B、  C、  C问题以“How many people…?”来询问回应了某广告的人数，因此回答了该数字的(C)是正确答案。(A)中出现了advertisement的缩略形式ad，起误导作用。(B)以人称代词开头，与问

Where do you want me to deliver this package?
(A) At 2 o’clock, if possible.
(B) Right here. Thanks.
(C) By evening, I promise.

How many people have responded to our advertisement?
(A) For the new ad, on page 3.
(B) He’s heard it already.
(C) At least 25, I hear.