题目内容：

阅读下面短文，从短文后各题所给的四个选项中选出可以填入空白处的最佳选项.

After a long day at school，I walked home with my heavy schoolbag. Sleepy and      , I threw my things on the couch and took something from the      to eat. I passed by the living room and wished I could watch TV, but I knew my      would take me the whole night. I took my schoolbag and went      to my room. I tried to understand chemistry and      sleepiness at the same time. I tried to keep my eyes      and I wanted something to cheer me up.

Later, I      the sound of the front door opening. And I waited for it—the sound of my mom singing. Though she sang off-key(跑调), it made me      that she was here. I ran down to      my mom. We hugged each other and talked for a while. I liked it when my mom was happy. Her      seemed to flow (流动) down to me and I got the strength to      the stress again.

Sometimes, I wonder how my mom can still be      after coming back from work. Every weekday, she wakes up      in the morning to go to work and spends an hour on the bus before getting downtown. At a clothing factory, she works standing for the whole day and      clothes. After work, my mom at times gets stuck （卡住） in        for two hours on her way back home. When I      my school life with her work life, I should not be the one to      . At least I have some interesting things to do at school, but while drawing patterns, one mistake at work can cost my mom her job. I      it when my mom has a positive attitude and lives her life with a joyous heart, which encourages me to do my work well.      there may be difficulties, seeing her happy makes me feel      , too.

1.A. heavy       B. busy       C. hungry    D. unlucky

2.A. classroom   B. kitchen     C. bedroom     D. apartment

3.A. dream      B. program     C. homework    D. experience

4.A. downstairs B. outside   C. upstairs    D. inside

5.A. break off   B. put off     C. take off  D. fight off

6.A. opening     B. opened    C. open        D. closing

7.A. felt        B. listened    C. raised     D. heard

8.A. disappointed B. tired      C. excited    D. stressed

9.A. look       B. greet     C. complain to D. help

10.A. stress   B. idea        C. belief     D. energy

11.A. face       B. change    C. support     D. leave

12.A. creative B. negative    C. competitive D. positive

13.A. early    B. soon        C. fast        D. late

14.A. managing B. organizing C. selling    D. designing

15.A. chat      B. traffic     C. duty        D. task

16.A. switch   B. exchange   C. connect     D. compare

17.A. complain   B. decide    C. study     D. play

18.A. achieve  B. notice    C. appreciate  D. challenge

19.A. However    B. While       C. As         D. Because

20.A. inspired B. bored       C. successful  D. important