问题
选择题
We must do whatever we can to ______the river from being polluted any more.
A．separate
B．keep
C．prevent
D．guard
答案
答案：C
搜题请搜索小程序“爱下问搜题”
We must do whatever we can to ______the river from being polluted any more.
A．separate
B．keep
C．prevent
D．guard
答案：C