题目内容
Shortly after the accident , two ______ police were sent to the spot to keep order .
A. dozens of B. dozens C. dozen of D. dozen
D
解析:
英语中一些表示数字的名词的前面如果用了数词,这些名词必须是单数形式,如dozen(一打),score(二十)和head (头) 等,例如:另外两打鸡蛋another two dozen eggs ; 八十七年前four score and seven years ago ; 五十五头牲口fifty-five head of cattle 。但是如果这些名词用来虚指某些可数名词时,这些名词呈复数形式,其后更加上介词of例如:dozens of pencils (几十支铅笔)和scores of tame birds (几十只家禽)。
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