题目内容：

阅读下列短文，从短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项。

Dear Mom and Dad,

    I’d like you to know that I appreciate everything you’ve done for me, such as teaching me, taking care of me ,and loving me.

    I’m writing this thank-you letter , Mom and Dad, because I want you to know what a big    you have truly made in my life. You me so many things about the world and myself. You were the first ones to tell me about the importance of by telling me it was to refuse all my other playmates from using my toys. And to this day,   those toys are long gone, I     to live by the idea of sharing my blessings with the people    me.

    Mom and Dad, you also    me to sympathetic towards the blind old  man. You told me that our pets are there for us to     and not to hurt. And because of those   , I’ve learnt to be .

    Thank you, Mom and Dad. You gave me some of the nicest . Mom, I remember how you would let me sleep in your bed and how you   to bring me my favorite fried chicken and take care of me whenever I was      .Dad, I remember how you worked to make me a playhouse in the yard so my friends and I could happily there.

  I may have   you and your purposes when I was much younger. But now I know that everything you did was for my own   .

  Mom and Dad, I this thank-you letter is enough to let you know how much I you for everything you’ve done for me. 

                                                                              All the love,

                                                                                 Rex

1.A. example B. plan    C. discovery   D. difference

2.A. left    B. taught    C. gave    D. showed

3.A. studying B. playing      C. sharing   D. living

4.A. kind  B. wrong    C. natural    D. possible

5.A. because  B. unless    C. before    D. though

6. A. continue B. stop    C. pretend   D. volunteer

7. A. beside  B. like    C. around    D. against

8.A. ordered B. educated   C. allowed   D. begged

9.A. play with B. clean up   C. take away   D. look after

10.A. stories B. lessons   C. promises   D. problems

11.A. caring B. polite    C. happy    D. clever

12.A. presents B. methods   C. memories   D. ideas

13.A. had   B. used    C. refused   D. decided

14.A. sick    B. tired    C. hungry      D. disappointed

15.A. freely B. differently    C. hard    D. deep

16.A. sleep    B. rest    C. play    D. work

17.A. misunderstood    B. ignored   C. forgotten    D. believed

18.A. nature B. pleasure       C. use    D. good

19. A. hope B. discover   C. agree    D. mean

20.A. miss B. appreciate   C. admire    D. reward