题目内容：

Volunteering abroad comes with a bit of a social stigma(耻辱). From my______, this couldn’t be further from the truth. Volunteering isn't so expensive that it's only a ______ for the well-off. I spent 10 weeks volunteering in Arizona with America Conservation Experience(ACE), helping ______ America's natural beauty.

The ______ was arranged through BUNAC, a work and volunteer organization. ________ it cost me around $1,000-- a sum which I ______ mostly by working part-time.

The self-indulgent(放纵自己的) image is ______ to overseas volunteer projects. However, the work can be _______ . I spent my time maintaining trails, building fences and carrying out projects in some of the national monuments of America. Summer temperatures in Arizona stay well above 35℃, ______ pleasant if you're carrying 50kg of concrete for 10 hours at a time. And then there was the wildlife to deal with, which______ my strength of character and made my ________ of the English household spider disappear.

________ do most people volunteer for? Probably they want to ________ things to the world. But in reality, you ________ just as much as the local communities and ecosystems you're helping.

Spending 10 weeks in America's most beautiful national parks and forests was______. I gained a far deeper________of the local environment than the average tourist,______ ex-national park rangers(护林者) who knew______ of the area's history and ecosystem. But best of all, my 10 weeks were spent volunteering with young people from a mix of______--from Belgians to South Koreans. When I left Arizona, I returned home having made a lifelong _______with people from around the world.

1.A. aspect    B. experience    C. impression    D. observation

2.A. choice    B. dream    C. habit    D. destination

3.A. explore    B. develop    C. preserve    D. find

4.A. trip    B. fund    C. organization    D. conference

5.A. In other words    B. As a result    C. In all    D. On average

6.A. awarded    B. sponsored    C. invested    D. covered

7.A. similar    B. equal    C. relevant    D. close

8.A. easy-going    B. hard-going    C. interesting    D. instructive

9.A. still    B. never    C. yet    D. even

10.A. enriched    B. challenged    C. improved    D. affected

11.A. fear    B. curiosity    C. frustration    D. dislike

12.A. Why    B. How    C. Who    D. What

13.A. take out    B. give back    C. make up    D. bring in

14.A. succeed    B. remember    C. learn    D. benefit

15.A. unreal    B. unbearable    C. unbelievable    D. unforgettable

16.A. meaning    B. appreciation    C. understanding    D. commitment

17.A. interviewing    B. meeting    C. inviting    D. recording

18.A. perfectly    B. partly    C. naturally    D. vividly

19.A. origins    B. platform    C. cultures    D. schools

20.A. campaign    B. promises    C. contest    D. bond