题目

阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。Alice: Mr. Black, this is Alice (speak). I'm calling to ask you if I can take the afternoon off today.Black: Well, of course. can you tell me what the problem is, Alice?Alice: OK, Mr. Black. My son is going to take part in a singing competition (hold) in Washington tomorrow. He's got so many things to take he can't go there alone.Black: So you want to take there in your minibus?Alice: Yes. And as soon as I put him up in the hotel, I (drive) back.Black: Well, that would be a (tire) 在△ABC中，AB=AC，点E，F分别在AB，AC上，AE=AF，BF与CE相交于点P．求证：PB=PC，并直接写出图中其他相等的线段．