prep 2-9 prep 2-9 The Environmental Protection Agency frequently puts mandatory controls on toxic substances that present as little risk当做危险的时候不可数 as one in a million chances to cause cancer. (A) as little risk as one in a million chances to cause (B) as little risk as one chance in a million of causing (C) as little risk as one chance in a million that it will cause (D) a risk as little as one chance in a million for causing (E) a risk as little as one chance in a million for it to cause Key: B表示 如果D和E改成a risk as little as one chance in a million of causing也就对了 后面这句我不太同意。risk是个不可数名词吧如果指危险的话。如果a risk表示的事危险的事。那么Present前面是个复数。substances这样的话不是就要用risks了吗?所以我认为最后这句话应该去掉。您看呢? 后来我又发现可以用复数然后Present a risk但是那是整体的表达一个危险。这里应该是不同的toxin substance有不用的risk吧 -- by 会员 cicy11 (2011/9/8 11:48:12)
其实这里的risk是一个整体概念,一个程度的概念。 主语复数,宾语单数是可以的哦 |