A、  B、  C、  A以How many开头的问句，要用表示数量的词来回答。话题内容是对将发生的事情进行预测，所以对过去进行设想的(B)和评价宴会的(C)都不是正确答案。因此正确答案是(A)。

You often work overtime these days, don’t you?
(A)Yes, I have a report due.
(B)It’s definitely a good offer.
(C)They might have some time.

How many people are expected at the banquet?
(A)Around 60 to 70.
(B)I didn’t expect that many either.
(C)It was planned very well.