It was shameful to be found sleeping in class. His classmates’ laughter only_____ his embarrassment.

What an _____ question it sounds! Even my daughter can answer it ________.

I’ll never forget those places of interest _________ I have visited in the past 10 years.

have you ever been to Beijing before?–No. it is the first time that I ____here.

He had hardly reached home _______ an unexpected guest came to visit him.