------Hey, Emily, I’ve got a used copy of our chemistry textbook for half price.
------ I’m afraid you your money. Yours is the first edition, but we’re supposed to be using the third edition.
A. had wasted
B. were wasting
C. wasted
D. will waste
网友回答
A. had wasted
B. were wasting
(答案→)C. wasted
D. will waste
解析：考查时态。本题根据句意用一般过去时，表示过去的事实。句意：——嗨，Emily，我以半价买了一本旧的化学书。——恐怕你浪费钱了，你的是第一版，但我们应当用第三版。故C正确。