题目内容：

    It was an extremely cold December night, and I had just settled into the living room sofa with a book when I heard a sharp knocking on the front door. The sound frightened me, mainly because it was 8:45 PM, quite dark outside, and I was alone. My husband had left two days before for a meeting.

I sat thinking for a moment about who could be at my door at that hour. I live on a really quiet street on the North Shore about a block off the main road. Hours can go by without a car or pedestrian(行人)passing in front of my home, a small house that's more than 100 years old.

Another moment passed. More sharp knocking. And then a face pressed against the square window in my front door, with which I made eye contact(接触). A woman's face. She was saying something, but I couldn't make it out.

I wish I could say that the first thing I wanted to do was to jump off the sofa to help this woman, but I hesitated(犹豫)because of all the bad stories about women who open their doors to strangers. What went through my mind was this: What if I open the door and she isn't alone but has an accomplice(同伙)hiding behind that big plant, and then they both come in and kill me?

Still, I opened the door. If I was killed, I had had a good life. She ran into my living room "Gracias. My phone---is dead." Speaking mostly Spanish, but intermixed with bits of English, the woman indicated(暗示)that she was lost, that her phone was dead and that she needed to call her sister who was supposed to have picked her up at the train station but hadn't. So she had decided to try and walk to her sister's but had gotten completely lost in the dark.

I offered to make her some tea while we waited for her phone to charge enough so that she could show me her sister's address.

1.Why does the author mention her surroundings in Paragraph 2?

A.To show off her wealth and social position.

B.To stress her house can seldom be visited.

C.To express her satisfaction with her life.

D.To explain how to find her house easily.

2.How did the author react to the knocking?

A.She turned a deaf ear to it.

B.She answered it immediately.

C.She asked her husband for advice.

D.She thought twice before opening the door.

3.What can we learn about the stranger?

A.She mistook her sister's address.

B.She was a native English speaker.

C.She meant to turn to the author for help.

D.She got in touch with her sister just recently.

4.Which of the following words can best describe the ending of the story?

A.Unusual. B.Relaxing.

C.Frightening. D.Painful.