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题库 / Prep2007E2-SC-30
Most of the purported health benefits of tea comes from antioxidants--compounds also found in beta carotene, vitamin E, and vitamin C that inhibit the formation of plaque along the body's blood vessels.
comes from antioxidants--compounds also found in beta carotene, vitamin E, and vitamin C that
comes from antioxidants--compounds that are also found in beta carotene, vitamin E, and vitamin C, and they
come from antioxidants--compounds also found in beta carotene, vitamin E, and vitamin C, and
come from antioxidants--compounds that are also found in beta carotene, vitamin E, and vitamin C and that
come from antioxidants--compounds also found in beta carotene, vitamin E, and vitamin C, and they
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C. come from antioxidants"”compounds also found in beta carotene, vitamin E, and vitamin C, and
D. come from antioxidants"”compounds that are also found in beta carotene, vitamin E, and vitamin C and that
Since the word "and" is a parallel marker, we must check parallelism. Notice how D is parallel after the dash:
compounds that are . . . . and that inhibit
We have nice verb parallelism here.
C breaks this parallelism by joining a noun and a verb:
compounds . . . and inhibit
yes, something is indeed wrong.
at best, 'they' is an ambiguous pronoun that potentially refers either to 'antioxidants'/'compounds' or to 'health benefits'. at worst it refers to 'health benefits', the subject of the preceding sentence, by default. either way, you've got problems.
the other problem is that a single dash of the sort that sets off the descriptor in this problem is akin to a single comma: both set off an appositive phrase, which is NOT allowed to contain independent clauses (such as the one beginning with 'they' in choice e). choice d follows the rules here, as, after the dash, it contains only subordinate clauses.
if you use a single dash, then the stuff that is set off by the dash must actually continue all the way to the end of the sentence. if you are going to block off a modifier with dashes, then you must use two dashes to block off the modifier.
i.e., there is no such thing as a modifier that is blocked off by a dash on the left, but by a comma on the right. if you have a modifier that does not extend to the end of the sentence, then you must use either two dashes or two commas to set it off.
compounds是antioxidants的同位语，由于后面非划线部分是动词inhibit， 而且从意思上来理解，found in beta carotene, ...和inhibit the formation ...应该都是在说的antioxidants，所以要用两个that从句来作定语修饰compounds。
C and如果是跟前面的句子并列，inhibit的主语就变成了benefits，语义错误。
E and后面的句子如果是跟前面的句子并列，they指代的是benefits，语义错误。
后半句说明这些成分好处的，与前面这些成分是并列关系，而非与主句是并列关系。所以C不对
compounds在从句中不成并列关系(A)，而且主语谓语单复数错误（AB）
这里变成了 health benefits inhibit