阅读下面短文，掌握其大意，然后从各题所给的A、B、C、D四个选项中，选出最佳选项。

Tired and hungry, two boys walked painfully and difficultly into a big city on October 16, on their feet that had just carried them 300 kilometers.

   For nine days they lived like old-fashioned travelers,   1somewhere new to sleep every night as they walked from one place to another. The boys slept in tents and   2a six-yuan daily plan. “I learned more in those nine days than I had in the last nine years,” said 17-year-old Li Zhao   3. Li and 15-year-old Li Xuemeng  4their journey on October 7, with three teachers from an Educational Motivation Research & Service Center. The purpose of the   5was for the two troubled boys to develop a (an)   6attitude to school and life.

   With two  7and some instant noodles for the first day, the five  8mainly along the Highway 107. On the way to the big city,  9of them visited schools and interviewed   10people from different walks of life. Both were asked to write about what they  11during the walk.

  “ The two boys need to know about   12life and learn to get rid of difficulties, so we   13this program,” explained Du Junpeng.    14they had tents, they didn’t just   15anywhere at night. “We had to   16on people’s kindness for shelter,” said Li Zhao, who admits he used to be self-centered and at first was    17against the idea of the trip. But the challenge of getting rid of the   18on the journey has changed him.

  “I’m more   19than before. And now I also believe failure is the mother of  20,” he said.

1.A. finding          B. hunting            C. searching                       D. inventing

2.A. lived on                B. worked on       C. carried out              D. went on

3.A. anxiously             B. luckily             C. excitedly                 D. tiredly

4.A. developed             B. separated                C. controlled               D. started

5.A. study                   B. trip                  C. task                        D. job

6.A. passive                B. popular            C. different                 D. active

7.A. tents                    B. lights               C. drinks                     D. tools

8.A. ran                      B. drove               C. walked                   D. marched

9.A. both                    B. none                C. either                      D. some

10.A. famous              B. brave               C. different                 D. strange

11.A. covered              B. learned             C. heard                      D. recognized

12.A. interesting          B. real                  C. hard                              D. meaningful

13.A. carried on           B. cared about      C. took over                       D. worked out

14.A. Although            B. If only             C. As though               D. Since

15.A. sleep                  B. adventure         C. move                      D. tour

16.A. get                     B. depend             C. take                        D. turn

17.A. hardly                B. heavily             C. strongly                  D. secretly

18.A. wrongs              B. problems          C. difficulties               D. fears

19.A. sociable              B. particular                C. common                 D. formal

20.A. success              B. victory             C. hope                       D. aim