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 Thrill 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, 500 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 Thrill 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. landed

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. leaves out    C. hangs out    D. puts out

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