听力练习录音文本和答案

M: Why is there a big sign on the back of your door that says “keys”?
W: It’s to remind me to take my keys when I go out because I’m always locking myself out by accident! It doesn’t help enough. Now I just forget to read the sign. 
Q: Why is there a sign on the back of the door?
5. Script
M: That history exam was really hard. The essay question was terrible!
W: I know, I wish I were like David. He has a photographic memory, you know. How useful that would be!
Q: What is true of David?