— The floor is clean and dry now. Who _______?— Sorry, I don’t know.
#41742
A
mopped it up
B
has mopped it up
C
has mopped up it
D
mopped up it
推荐题目
Have you finished you work  ? Yes, I have finished it  . I finished it    1 hour ago. 
#39927
A
already ,yet ,/
B
yet , already, /
C
yet ,yet, since
D
yet ,already, since
 My uncle is an experienced teacher. He_____English since 2002.
#36583
A
teaches
B
taught
C
has taught
D
will teach
A new school building _____ in Zhuyuan Middle School in next year.
#38781
A
will be built
B
is built
C
will built
D
buil