The Titanic, the biggest ship of its day, ____ unsinkable, but it sank on its first voyage in 1912.
Driving a car is not so difficult as you imagine, if you _____ the rules.
Remember not to ____ when you enter the room.
Suddenly the small boy stopped and bent down as if to _____ something.
Would you please turn your radio a little? I’m tired now and feel like sleeping.
Peter is my close friend, who can be what he promises.