问题
选择题
The floor is so wet. Let’s _____________.
A．stop mopping it up
B．stop to mop it up.
C．stop mopping up it
D．stop to mop up it
答案
答案：B
题目分析：句意：地板很湿。让我们停下来把它清理干净。Let sb do sth让某人做某事；stop doing sth停止做某事；stop to do sth停下来去做某事；mop ···up把···清理干净，是一个动词加副词构成的短语，代词宾语要放在其中间，所以选B。