It was quite late at night. I was reading a newspaper in my

It was quite late at night. I was reading a newspaper in my room when I heard someone knocking at the door. I opened it and saw a young man with glasses standing there. Of course, I didn’t know him. He said that he was a friend of my sister’s and wanted to have a talk with her. I wanted to know if my sister had such a friend，but I had to let him in.
As he talked, I found that he knew nothing about my sister. Then I came to know that his words were not true. Suddenly my sister came back and the young man was so surprised that he didn’t know what to do for a moment. I caught the man by the arm at once while my sister was calling the police.
（  ） 1. This happened _____.
A. on one morning              B. on one afternoon
C. on one evening               D. on one night
（  ） 2. There _____ in the room when someone was knocking at the door.
A. was one person                     B. were two persons
C. were three persons                D. were four persons
（  ） 3. The writer saw the young man for the _____ time.
A. first      B. second          C. third      D. fourth
（  ） 4. The young man _____.
A. was a friend of the writer’s    B. was a friend of his sister’s
C. was a stranger to them       D. both A and B
（  ） 5. The young man was _____ when he saw the writer’s sister.
A. sad       B. surprised      C. happy        D. sorry