---I hear that Mary won the prize of the biology contestShe was not interested in it

问题补充：

---I hear that Mary won the prize of the biology contest.

--- She was not interested in it at all.

A. You’re kidding!

B. So what?

C. Why not?

D. Not really

答案：

(答案→)A. You’re kidding!

B. So what?

C. Why not?

D. Not really

解析：考查交际用语。You’re kidding! 你在开玩笑吧！So what?那又怎么样？Why not? 为什么不呢？Not really不完全是，句意：我听说玛丽生物考试获奖了。你在开玩笑吧！她根本对生物不感兴趣。所以选A。