【答案解析】[听力原文]10-12 M: Excuse me. Have you been waiting long? W: Twenty minutes already. M: Did you notice whether the No. 7 bus has passed by? W: Not while I've been standing here. I'm also waiting for the No. 7 bus myself. M: Good. Hot today, isn't it? W: Yes, it is. I wish that it would rain and cool off. M: Me, too. This is unusual for March. I don't remember it ever being so hot and dry in March before. W: My mother and I have just moved here from Indiana. It is pretty cold there. M: Yes, I've heard of that. W: Do you think we've missed the bus? M: Take it easy. It never comes exactly on the half hour like it should.
单选题
According to the conversation; what kind of weather is usual for March?