Let’s ______ for a walk, shall me?
Unluckily, Mr Brown drove so_________that his car crashed into a tree yesterday evening.
Most of my friends like driving or riding to work, _________I like walking.
It is important_________us students to make a plan_________our studies before a new term starts.
After eight hours’ hard work, the firemen finally_________the forest fire.
It ’s our duty to_________people_________too many trees.