thirty
This is _______ story I’ve told you about.Isn’t it _______ interesting one?
This is the first time that I _____ the summer palace.
—Excuse me, could you tell me where the post office is?—__________, but I’m a stranger here.
He may not even drink water at night, _______ swallowing insects possibly floating on the surface.
I clean my room once a week, and the job _____ me two hours.