---Della, would you like some potato chips? ---No potato chips for me---I’m ______ a diet.
----Why did you go back to the shop? -----I left my friend _____there.
I advise you to give up smoking for it is _____to your health.
I don’t doubt _____he will come next week.
When the thief found the police had already _____him, he ran away quickly.
Tom’s father didn’t _____him to join the school football team.