问题补充：
---How did you find out it is my birthday today?
---.
A. I mean it
B. A little bird told me
C. It’s a deal
D. Great minds think alike
答案：
A. I mean it
(答案→)B. A little bird told me
C. It’s a deal
D. Great minds think alike
解析： A. I mean it我是认真的，B. A little bird told me有人告诉我了。， C. It’s a deal成交，D. Great minds think alike智者所见略同。句意：--你怎么知道今天是我的生日的？--有人告诉我了。选B。
