It is _____that he has been addicted to the drugs and has difficulty quitting it.
If you don’t feel well, you may just ______.
----Where can we get a baseball? ----Let’s ______.
----My model ship doesn’t work. ----Don’t worry. I’ll have it ______this afternoon.
You ______wash your hands before meals.
Will you ______the light? It’s dark in the room.