题目内容：

阅读下面短文, 从短文后所给各题的四个选项(A、B、C和D)中，选出可以填入空白的最佳选项。

It was in my high school science class. I was doing a task in front of the classroom with my favorite shirt on.

A      came, “Nice shirt,” I smiled from ear to ear. Then another voice said, “That shirt belonged to my dad. Greg’s mother works for my family. We were going to      that shirt away, but gave it to her      .” I was speechless. I wanted to hide.

I     the shirt in the back of the closet and told my mum what had happened. She then dialed her     , “I will no longer work for your family,” she told him. That night, Mom told my dad that she couldn’t clean anymore; she knew her life’s     was something greater.

The next morning she     with the personnel manager at the Board of Education. He told her that without a proper education she could not teach. So Mom decided to     a university.

After the first year in college, she went back to the personnel manager．He said, “You are     , aren’t you? I think I have a     for you as a teacher’s assistant. This opportunity deals with children who are mentally challenged with little or no chance of    .” Mom accepted the opportunity very     .

For almost five years, as a teacher’s assistant, she saw teacher after teacher give up on the children and quit, feeling     .Then one day, the personnel manager and the principal     in her classroom．The principal said, “We have watched how you     the children and how they communicate with you and admire your hard-working     over the last five years. We are all in agreement that you     be the teacher of this class.”

My mom spent more than 20 years there.     her career, she was voted Teacher of the Year. All of this came about because of the     comment made in the classroom that day. Mom showed me how to handle     situations and never give up.

1.A．noise      B．tune           C．sound       D．voice

2.A．throw       B．take           C．carry        D．get

3.A．otherwise   B．anyhow        C．instead     D．actually

4.A．settled    B．pushed         C．hid          D．put

5.A．teacher   B．director      C． employer    D．adviser

6.A．success     B．encouragement  C．purpose     D．victory

7.A．went        B．met           C．worked       D．stayed

8.A．visit       B．continue      C．attend       D．prepare

9.A．serious     B．fortunate      C．careful      D．responsible

10.A．career     B．position       C．duty         D．part

11.A．judging    B．learning       C．obeying      D．imagining

12.A．patiently  B．eagerly        C．successfully D．skillfully

13.A．guilty    B．frightened   C．upset       D．ashamed

14.A．looked up  B.  went up       C．took up     D．showed up

15.A．believe  B．protect        C．receive      D．treat

16.A．action    B．intention     C．spirit       D．attempt

17.A．must       B．ought         C．might        D．should

18.A．At         B．On            C．During       D．With

19.A．worthless  B．thoughtless    C．hopeless     D．helpless

20.A．strange    B．different      C．dangerous   D．challenging