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老师:
Boys and girls, there will be an exam tomorrow. 
同学们.我们明天考试.
学生:
Ah? Really? That stinks!
啊?不是吧?太郁闷了!
老师:
Haha, April Fool's! Do you forget what day it is today?
哈哈.今天是愚人节!怎么都忘了?
学生:
Wow, you were pulling our leg all along. I was really fooled.
哇.原来是骗我们的.我被作弄了!
老师:
Alright, now let's be serious. Actually-you'll take an exam today.
好了.不跟大家开玩笑了.其实--我们是今天考试.
学生:
What?-
什么?