问题
选择题
We must do something to stop people from ______.
A．to throw litter about
B．to throw litter into
C．throwing litter about
D．throwing litter into
答案
答案：C
搜题请搜索小程序“爱下问搜题”
We must do something to stop people from ______.
A．to throw litter about
B．to throw litter into
C．throwing litter about
D．throwing litter into
答案：C