“I think her concerns should be taken seriously. She shouldn’t be harassed in this way,” says Ann Clarke, a plant biologist at the University of Guelph in Canada who also testified before the commission. “It’s an attempt to silence the opposition.”

　　21. The passage centers on the controversy ________.

　　A) between American and New Zealand biologists over genetic modification

　　B) as to whether the study of genetic modification should be continued

　　C) over the possible adverse effect of a GM bacterium on plants

　　D) about whether Elaine Ingham should be fired by her university

　　22. Ingham insists that her testimony is based on ________.

　　A) evidence provided by the EPA of the United States

　　B) the results of an experiment she conducted herself

　　C) evidence from her collaborative research with German biologists

　　D) the results of extensive field tests in Corvallis, Oregon

　　23. According to Janet Anderson, the EPA ________.

　　A) has cancelled its approval for field tests of the GM organism

　　B) hasn’t reviewed the findings of Ingham’s research

　　C) has approved field tests using the GM organism

　　D) hasn’t given permission to field test the GM organism

　　24. According to Ann Clarke, the New Zealand Life Sciences Network ________.

　　A) should gather evidence to discredit Ingham’s claims

　　B) should require that the research by their biologists be regulated

　　C) shouldn’t demand that Ingham be disciplined for voicing her views

　　D) shouldn’t appease the opposition in such a quiet way

　　25. Which of the following statements about Ingham is TRUE?

　　A) Her testimony hasn’t been supported by the EPA.

　　B) Her credibility as a scientist hasn’t been undermined.

　　C) She is firmly supported by her university.

　　D) She has made great contributions to the study of GM bacteria.