You should try to _____ the problems by yourself. You are not a child any longer.
John is in trouble now. Let’s go and help.
I don’t know _________, but I guess he may be a doctor.
— I wonder ________ you water this kind of flower. ---Every other day.
Try on this red skirt; you will look great ________it.
—Will someone go and get Dr White? —He’s already been _________.