题目内容：

阅读下面短文，从短文后各题所给的四个选项（A、B、C、D)中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。

“Paul must have been trying to carry his waste paper to garbage can and dropped a few pieces.” I     , picking them up.       later I found more pieces. No quiet sighing this time. I     ,   “Who is throwing garbage?” No answer. Instead, I saw more bits of paper silently floating     from upstairs. Looking up, I saw my seven-year-old son, Paul.

“Stop making a mess.’’ “It’s not a mess. They’re     .” “Sorry, what did you say?” I hadn’t heard him clearly.

He didn’t answer me. Paul has autism (自闭症) and       answers a question, especially when he’s     attentively on something else. He ran down the stairs. “Where are my other butterflies?” he asked,     around. Every time Paul     five or more words together, my heart says a     of thanks. But lately he seems to     that the benefits of forming complete sentences when communicating are     of the effort.

Butterflies. Of course. I rushed to     them from the garbage,     them off and handed them to my young artist. “Want to see them     again?” he asked with a shy smile. “Oh yes! They’re beautiful.” I whispered. He ran back upstairs to float his     down again. They really did look like beautiful butterflies.

That day Paul     me to look up at     instead of down at garbage. How many other masterpieces do I miss because I’m too caught up in my     to take time to appreciate what’s right in front of me? Life is not what happens to us. It’s     we look at it. Now, I look up.

1.A. laughed       B. sighed   C. amazed   D. shouted

2.A. Days    B. Years    C. Moments   D. Weeks

3.A. called out   B. turned up   C. got in    D. added to

4.A. up        B. down    C. away    D. off

5.A. planes    B. papers   C. leaves   D. butterflies

6.A. rarely    B. frequently   C. willingly   D. eagerly

7.A. devoted       B. depended   C. focused   D. addicted

8.A. showing       B. looking   C. playing   D. drawing

9.A. spells    B. puts    C. pushes   D. accumulates

10.A. sound    B. remark   C. report   D. prayer

11.A. refuse    B. hear    C. mind    D. realize

12.A. worthy       B. aware   C. fond    D. typical

13.A. hide    B. destroy   C. rescue   D. remove

14.A. tore    B. dusted   C. cut    D. seized

15.A. throw    B. flow    C. land    D. fly

16.A. masterpieces B. schoolwork C. inventions   D. imagination

17.A. reminded   B. forced   C. intended   D. permitted

18.A. mistakes   B. weaknesses C. beauty   D. scenery

19.A. amusement   B. housework C. communication D. homework

20.A. when    B. whether   C. where   D. how