【答案解析】[听力原文]
M: Kate! I thought you were going to leave early today to take your son to the show.
W: I"m still planning to. But I can"t leave until I"ve finished typing all the letters.
M: Can"t you leave that until tomorrow?
W: No, the boss wants them first thing tomorrow morning.
M: How many have you got left?
W: About 5.
M: Why don"t you just go ahead? I"ll do the letters for you.
W: Oh, thank you very much, Jim. You"re so kind.
单选题
How many letters left does the woman have to type?