A young woman traveled and stayed in a hotel． All the rooms in the hotel were singles（单人间）． So she lived in a single room．

Just when she was going to bed， there was a knock at the door． She had no friends in the city． So she was quite surprised but still opened the door．

The man who was standing at the door looked a little nervous． "Oh! I'm sorry． I thought this was my room，" the man said and walked away in a hurry．

The woman called the police at once． Soon， the man was caught． He was a thief（小偷）! But how did the woman know that？

All the rooms in the hotel were singles． Who would knock at his own door if he was staying alone？ Only a thief would do this． He wanted to see if anyone was inside before he broke into the room．

（1）A young woman traveled and stayed 　 　．

A．	in a hotel
B．	in a police office
C．	in a park
D．	in her friend's home

（2）The man looked a little 　 　when the woman opened the door．

A．	happy
B．	nervous
C．	mad
D．	relaxed

（3）The man knocked at the door to 　 　．

A．	find his friend in the city
B．	stay alone
C．	see if anyone was inside
D．	call the police