----May I help you, Madam ?--I’d like to have those eggs .A. two dozen ofB. two dozens

----May I help you, Madam ? ----I’d like to have those eggs .
A. two dozen of
B. two dozens
C. two dozens of
D. two dozen

(答案→)A. two dozen ofB. two dozensC. two dozens ofD. two dozen解析：考查数词：句意：--要我帮忙吗，夫人？--我想要两打鸡蛋。Dozen是“一打”，前面接具体的数词的时候，dozen不用复数，后面可以直接接名词，但是如果名词前面有象those，these，the，或是形容词性物主代词，就要和of搭配使用，所以选A。

好好学习下