PREP里面一题

seal610

prep 2-9 The Environmental Protection Agency frequently puts mandatory controls on toxic substances that present as little risk 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

答案B 那个one chance in a million of causing 是个习语么？PREP里面直接就说DE改成这个就对了，求指教

shkyxy

同问啊