听力原文：W: (19)Why the long face? I've never seen you so down. I thought you quit smoking. How come you started again? M: Troubles, my dear sister. (20)Female troubles. What a bunch of headaches! W: Which one now, or should I ask you how many? M: Be serious! Just the one I've been going with for the past two months. W: You mean the gorgeous blond, Monica, that you fell so hard for? Kind of sudden, wasn't it? M: That's the one. (20)I thought she was the one for me, my ideal woman, the girl of nay dream. Now I've found out she seems to be cheating on me. W: Really? No wonder you're so depressed. She's not the only fish in the sea, you know. Step out of home and go downtown, have a beer, and find another chance. M: Oh, knock it off, Maria. I've been true to her, but she's been playing around. You see, we were supposed to meet at the Student Union yesterday, but she didn't turn up. When I finally called her this morning, she told a lie to me. W: Why are you so sure that it was a lie? Don't you trust her? M: Her story didn't hang together. Besides, Michael came to tell me Monica was dating with some guy in a club while I cooled my heels waiting for her in the Union. It makes me boil. W: Hey, calm down, Daniel. (21)Are you going to take Michael's word for it? How could he have known when and where you were meeting? (20)