单项选择题 听力原文：M: When you saw the accident, did you ring us immediately?M: Yes, the first thing which struck me was to call the police.From the conversation what is the probable relationship between the two speaker?A．Policeman and policewoman.B．Policeman and witness of an accident.C．Bus driver and victim.D．Policeman and thief.

单项选择题 属于烧结普通砖的是（）。

单项选择题 听力原文：W: Hey, Margo! Do you know where the scissors are?M: Aren't they in the desk drawer?W: That's the first place I looked.What can we infer from the conversation?A．The woman will search the desk drawer.B．The scissors are in the desk drawer.C．The woman has searched the desk drawer.D．The scissors have been found.