阅读下列短文，然后从每小题A、B、C、D四个选项中选出能回答所提问题或完成所给句子的最佳答案。

      A mother and her daughter lived in a village. Every night, the mother would lock the door with three locks,

because she was afraid that a thief might come in. As time went by, the daughter became tired of her boring life

there, and dreamed to go to the city to see the outside world. One day, she left home without telling her mother.

"Forget me, Mom," she thought. 

      But the outside world wasn't as good as she thought. Ten years later, she came back home with a tired body

and mind. 

      When she got home, it was dark. She knocked at the door, but nobody answered. Surprisingly, she found

that the door was unlocked. She came in and saw her mother lying on bed, sleeping. Tears ran down her face.

Hearing the cry of her daughter, the mother awoke. They hugged and cried. Later, the daughter asked, "Mom,

why didn't you lock the door today?" The mother said, "I haven't locked the door since you left. I was afraid

you wouldn't be able to get in when you came back."

1. Why did the mother lock the door with three locks every night? [ ]

A. Because the door was not strong enough.

B. Because her daughter asked her to do so.

C. Because there was a lot of money at her home.

D. Because she thought a thief would come in.

2. The daughter left home one day because _______. [ ]

A. she didn't love her mother

B. she thought her life was not interesting

C. her mother didn't lock the door that day

D. her mother wanted her to see the outside world

3. When the daughter came back, she was _______. [ ]

A. excited

B. afraid

C. tired

D. proud

4. What does the underlined word "hugged" mean in Chinese? [ ]

A. 抱怨

B. 拥抱

C. 争吵

D. 惊恐

5. From the passage, we know that _______. [ ]

A. a thief came to their house before

B. the daughter lived in a rich family

C. the daughter liked the outside world best

D. the mother loved her daughter very much