23.
感谢大耳朵网友“NIST”提供的听力原文!
1)It's raining cats and dogs.

2)He stopped reading and looked up.

3)On my way home I looked up an old friend of mine.

4)He pulled a tired smile when he stepped out of the room.

——No.3 遗漏一个单词old，谢谢。已经更正,谢谢!