Scientists are convinced ______ the positive effect of laughter ______ physical and mental health.
In the opinion of some students, they don’t study for pleasure — their main ______ is to enter a famous university.
— Terribly sorry but I thought this was a parking lot. — ______. Here is your ticket.
You can read her own personal ______ of her experience in her diary.
I’d appreciate ______ if you could let me know in advance whether or not you will come.
— John has put forward ______ most challenging question for us to answer. — Yes, it really is. I have never heard ______ harder one.