— The floor is clean and dry now. Who ?
— Sorry, I don’t know.
A. mopped it up
B. has mopped it up
C. has mopped up it
D. mopped up it
网友回答
A. mopped it up
(答案→)B. has mopped it up
C. has mopped up it
D. mopped up it
解析:从题意来讲,本题需要的是现在完成时,而mop ..up 为动词+adv词组,若宾语为人称代词时,位于中间,故选B