– You won the first prize in the physics contest !
-- ________ ! I made several terrible mistakes .
A.I think so
B.You must be joking
C.You must be serious
D.I’m afraid so
答案:B
题目分析:A. .我认为如此 B. 你一定在开玩笑吧 C. .你一定是认真的。D. 我恐怕如此。 句意:你在物理竞赛上获得一等奖了!—你在开玩笑吧!我犯了几个严重的错误。结合题意,故选B。