6. In virtually all types of tissue in every animal species, dioxin induces the production of enzymes that are the organism’s trying to metabolize, or render harmless, the chemical that is irritating it.
A. trying to metabolize, or render harmless, the chemical that is irritating it
B. trying that it metabolize, or render harmless, the . chemical irritant
C. attempt to try to metabolize, or render harmless, such a chemical irritant
D. attempt to try and metabolize, or render harmless, the chemical irritating it
E. attempt to metabolize, or render harmless, the chemical irritant
1. 抽象名词优于动名词做名词性结构----所有格的宾语。
Attempt 好于 trying 做所有格的宾语。动名词强调动作本身，抽象名词强调对应动作的结果。
2. 并列结构：
A is B 结构中， A/B 要平行。enzymes that are the organism’s trying结构中 enzymes 要和 are 后面的成分对等，即名词 are 名词（此时宾语不能用动名词）
3. 特殊结构：
OG 解释The phrase the chemical irritant is also the most concise and precise conclusion for the sentence because it clearly refers to the dioxin mentioned earlier.
（In virtually all types of tissue in every animal species,） dioxin induces the production of enzymes that are the organism’s attempt（attempt to metabolize, or render harmless, the chemical irritant）
render harmless, the chemical irritant ==》render the chemical irritant harmless ，宾语放在后面。render为＂使得＂的意思(后接受词+受词补语 )
chemical irritant->指dioxin(受词, O.)
harmless->受词补语(O.C.)
4. virtually modifies all 而不是修饰 all types of tissue
5. 简洁： attempt to try 不简洁
6. 词法： try + that … 结构错误， try to do sth.
7. 主语和宾语的数的一致：宾语为具体名词时，通常要求主语和宾语数的一致。宾语为抽象名词时，主语和宾语的数可以不一致。enzymes that are the organism’s attempt Attempt 此处表示抽象的动作，可以用单数。
我总结下来，考单复数的题无非两种考法：1 主谓搭配 2 指代。本题两者皆不是，不要太在意。所以本答案原句为: attempt to metabolize, or render the chemical irritant harmless
