The professor ________at 8 o’clock,but he has not shown up yet,which worries all of us.
—I think you should phone Jenny and say sorry to her. —__________! It was her fault.
This question is rather __________ for a child of only five years old. That's to say, you should ask a simpler one.
He __________ the lecture given by the famous professor and uploaded it online.
It was from May 1 to Oct. 31,2010__________ the World Expo 2010 Shanghai was held,__________ was a great event for the Chinese people.
Going out of the park, the visitors all said they were deeply __________ by what they had seen there.