How dirty the floor is! You should have someone it at least twice a day.A. mopB. to mopC.

问题补充：

How dirty the floor is! You should have someone it at least twice a day.

A. mop

B. to mop

C. mopping

D. mopped

答案：

(答案→)A. mop

B. to mop

C. mopping

D. mopped

解析：考查have的用法，have sb do sth意思“让某人做某事”，所以选A，句子意思“地板好脏啊，你本应该让某人一天至少拖地两次”