1. I've already           (付款) for that book.
2. The ____      (政府)has done a lot to protect the wild animals.
3.____        (天然的)food is good for our health.
4.1 will remember my first teacher____         (永远)．
5. We must take a____         (科学的)approach to the problem.

Dear Mom,
       Time flies quickly. Two months has gone by since I joined this boarding school. Everything is going
well. During my first month here, I was like a fish out of water. I came to realize how many things I should
thank you for.
       On the cold winter days, I have to get up early almost every morning to fetch hot water. I began to
feel ashamed that I never said 'thank you" every time you prepared (准备) hot water for me each morning on winter days before I got up.
       I am no longer that girl who was often unable to find her books in her bedroom. It used to take me a
lot of time to collect all the books for the day's classes. But I have gotten over that bad habit now. And
now I know how much time you used to take to collect my books every evening.
       I have learned to do the laundry on my own now. I came to realize that washing clothes is a boring
job, especially on winter days. Sometimes there is no hot water and I have to wash my clothes with cold
water by hand.
       I came to know how grateful (感激的) I should be to have you as my mom. Thank you, Mom.
                                                                                                                                                     Yours, 
                                                                                                                                                     Silvia

根据材料内容，选择最佳选项。

1. Silvia has been at the boarding school for _______.

A. one week        
B. two weeks
C. one month        
D. two months

2. The underlined word "ashamed" means "________" in Chinese.

A. 惭愧的
B. 恐惧的
C. 吃惊的
D. 轻率的

3. At the boarding school, Silvia doesn't ______ anymore.

A. do her laundry
B. put her books everywhere
C. say "thank you" to her mother
D. spend much time on her studies

4. From the letter we can learn that ______.

A. Silvia used to do her laundry at home
B. Silvia often helps her mom do housework  
C. Silvia's mom has done many things for her before
D. Silvia's mom usually does the laundry with cold water

5. Silvia wrote this letter in order to tell her mom _______.

A. her school life    
B. her thanks from her heart
C. she could do many things
D. she could look after herself