F: John was using his mobile phone in class, it was really impolite. ,M: No wonder the teacher was so angry. I thought someone had forgotten his homework again.
(A) F: I’m sorry, I didn’t understand. Could you repeat a little louder, please? (B) F: John was playing with his cell phone in class. But it's nothing. What made the teacher angry was that he didn't do his homework. (C) F: John didn't do his homework, which made the teacher angry. (D) F: John was sleeping in class, which made the teacher angry.
A