Mixed with an equalpart of water, ethylene glycol, a compound commonly used as an automotiveantifreeze, is effective at temperatures as low as –30 degreesFahrenheit.
A. temperatures as low
B. temperatures so low
C. as low temperatures
D. as few (A)
E. as little
答案是A, 笔记说c at 后面没有宾语，
接着又举例，prep 2-9 The EnvironmentalProtection Agency frequently puts mandatory controls on toxic substances thatpresent as little risk as one in a million chances to cause cancer.
(A) as little riskas one in a million chances to cause
(B) as little riskas one chance in a million of causing
(C) as little riskas one chance in a million that it will cause
(D) a risk as littleas one chance in a million for causing
(E) a risk as littleas one chance in a million for it to cause
Key: B
如果D和E改成a risk as little as one chance in a million ofcausing也就对了
那第二个例子的B，present后面也没有宾语阿
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