这题就OK。因为cost是复数,一搞就知道是在讲effect而不是全句。 119. Executives and federal officials say that the use of crack and cocaine is growing rapidly among workers, significantly compounding the effects of drug and alcohol abuse, which already are a cost to business of more than $100 billion a year. (A) significantly compounding the effects of drug and alcohol abuse, which already are a cost to business of (B) significantly compounding the effects of drug and alcohol abuse, which already cost business (C) significantly compounding the effects of drug and alcohol abuse, already with business costs of (D) significant in compounding the effects of drug and alcohol abuse, and already costing business (E) significant in compounding the effects of drug and alcohol abuse, and already costs business Choice B, the best answer, uses clear and concise phrasing to state that it is the effects of drug and alcohol abuse that already cost business the sum mentioned. In A, to business is awkwardly and confusingly inserted between cost and the prepositional phrase that modifies it, and are already a cost to business is wordy and awkward compared to cost business. In C, already with business costs of... is awkward and unclear, failing to specify that those prior effects generate the cost. Choices D and E produce faulty constructions with the phrase significant in compounding, which cannot grammatically modify the verb form is growing
好像turtle的解释有点牵强, 因为cost是复数,一搞就知道是在讲effect而不是全句
I don't think so, because which is refer to "the effects of drug and alcohol abuse", of course, it should use cost.
但不能由此就推出 which+单数动词 常错 的规则.
因为49T A,C,E错是因为 which从意思上看是要表达detection, 但there is no specific noun, such as detection, to which it can refer.
........detection,which doubles..........我想是对的.
(which 拼命找丈母娘detection 娶doubles, 可连丈母娘面都见不着,可怎么娶媳妇??对吧)
78T . 是因为which前面就没有名词吗,当然错了
拙见, 请指教.谢谢狗屁GG的分享.能这么细心很难得.thanks
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