The floor is quite wet and my teacher told us quickly.A. to mop up itB. mopped it upC. t

问题补充：

The floor is quite wet, and my teacher told us quickly.

A. to mop up it

B. mopped it up

C. to mop it up

D. mop it up

答案：

A. to mop up it

B. mopped it up

(答案→)C. to mop it up

D. mop it up

解析：tell sb to do sth，同时mop ···up为动词+adv构成，如果其宾语为人称代词宾格形式，应该位于二者之间。