A、 She engaged in field research on environmental pollution.
B、 She helped families move away from industrial polluters.
C、 She taught chemistry and microbiology courses in a college.
D、 She gave lectures on how to become a public speaker.

【正确答案】 A

【答案解析】解析：“As part of her job，she conducted field research on toxic substances in the environment，often in minority communities located near large industrial polluters．”句意：她工作的一部分是，对环境的有毒物质进行现场的调查，经常在工业污染源严重的少数民族居住区。可推知她从事环境污染研究。

A、 The job restricted her from revealing her findings.
B、 She was offered a better job in a minority community.
C、 The job posed a potential threat to her health.
D、 She found the working conditions frustrating.

【正确答案】 A

【答案解析】解析：从“Frustrated by these restrictions，Subra left her job in 1981，”可知她的工作限制她把调查结果公之于众，于是愤而辞职。

A、 More branches of her company have been set up.
B、 Many toxic sites in America have been cleaned up.
C、 More environmental organizations have appeared.
D、 Some giant industrial polluters have gone out of business.

【正确答案】 B

【答案解析】解析：“Because of her efforts，dozens of toxic sites across the country have been cleaned up．”句意：由于她的努力，整个国家好几个有毒的地方都被清理干净了。

A、 Her rigorous training in delivering eloquent speeches.
B、 Her lifelong commitment to domestic and global issues.
C、 He widespread influence among members of Congress.
D、 Her ability to communicate through public speaking.

【正确答案】 D

【答案解析】解析：“Partly through her scientific training，partly through her commitment to environmental justice．But just as important is her ability to communicate with people through public speaking．“Public speaking，”she says，“is the primary vehicle I use for reaching people．”从这句可以看出她的成功一部分是她科学的训练，一部分是她对环境正义的承诺，最重要的是她通过演讲获得的沟通能力。故答案为D。

A、 Japan.
B、 Mexico.
C、 China.
D、 Canada.

【正确答案】 C

【答案解析】解析：“Along the way she has lectured at Harvard，testified before Congress，and addressed audiences in 40 states，as well as in Mexico，Canada, and Japan．”从中可以看出她在哈佛大学开过讲座，在国会作过证，在墨西哥，加拿大和日本以及国内四十个州进行过演讲。故答案为C。