They sold boxes of such sweets last week.A. four dozens ofB. four dozenC. four dozen ofD

问题补充：

They sold boxes of such sweets last week.

A. four dozens of

B. four dozen

C. four dozen of

D. four dozens

答案：

A. four dozens of

(答案→)B. four dozen

C. four dozen of

D. four dozens

解析：考查数词的用法：dozen“二十”，前有数字时不加s,也不加of，用dozens of的时候dozen必须加s.表示“很多”，句意：上个星期，他们买了80盒这样的糖果。选B。