题目内容：

Experts say boredom is good for kids．It forces them to be creative，___their imaginations and helps them discover new things．A(n)______in point is 13-year-old Luke Thill from Dubuque, Iowa.

Luke was______of playing video games and riding his bike, so he decided to build a tiny house in his backyard instead．He made money from cutting lawns(草坪)and______exchanged some services，such as gaining the help of an electrical engineer______sweeping his garage．Luke also______spare materials from his grandmother’s house and other______materials from his neighbors for some of the windows and the door．

The 89-square—foot home cost $1，5 00 to build and______18 months．Inside there’s a kitchenette，a back sitting room，a table and a mounted(镶嵌的)TV，and an upstairs bedroom can be easily______by stairway．

Although Luke did the______and learned how to do all the work．he had his father’s______throughout the project．Greg Thill was very happy that his son learned to stay on_____and deal with grown-ups．_____，he had some simple rules when Luke______the house：“You _______the money．You build it．And you own it．’’

Luke is now in love with _______. He has a YouTube channel and hopes to______other kids to start building．______，he wants to build a bigger tiny house to live in，but for now，he______in his new home a few nights a week，does homework there，and uses it to take a______from his twin brother．

1.A. changes    B. ignores    C. improves    D. weakens

2.A. method    B. explanation    C. procedure    D. case

3.A. tired    B. fond    C. confident    D. guilty

4.A. thus    B. even    C. still    D. anyhow

5.A. in exchange for    B. in praise for    C. in support of    D. in place of

6.A. updated    B. ordered    C. removed    D. used

7.A. recycled    B. cheap    C. new    D. raw

8.A. spent    B. took    C. saved    D. wasted

9.A. supported    B. accessed    C. held    D. 1anded

10.A. research    B. housework    C. experiment    D. discovery

11.A. permission    B. help    C. control    D. order

12.A. credit    B. business    C. budget    D. duty

13.A. Therefore    B. Besides    C. Rather    D. However

14.A. finished    B. decorated    C. started    D. painted

15.A. borrow    B. donate    C. raise    D. distribute

16.A. books    B. videos    C. riding    D. building

17.A. inspire    B. press    C. command    D. warn

18.A. Luckily    B. Eventually    C. Frequently    D. Strangely

19.A. brings out    B. 1eaves out    C. hangs out    D. puts out

20.A. ride    B. risk    C. chance    D. break