问题
选择题
The floor is very dirty. Will you please _____? [ ]
A. mop it up
B. mop up it
C. to mop it up
D. to mop up it
答案
答案：A
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The floor is very dirty. Will you please _____? [ ]
A. mop it up
B. mop up it
C. to mop it up
D. to mop up it
答案：A