we must ask people not to cyt down trees now.保持句意不变

题目

we must ask people not to cyt down trees now.保持句意不变
we must ______ people ______cutting down trees now.

答案

we must ( prevent ) people ( from )cutting down trees now.
prevent sb.from doing sth 阻止某人做某事
我们现在必须阻止人们砍伐树木.