---Mum, I’m going to visit my aunt. What about a week? ---A week is too long. Try to be back in ____of days.
You can hardly imagine the difficulty the woman had ____ her children.
Barack Obama delivered a speech to 500 local youths during his visit to China, many of ____ from Fudan University and Tongji University.
---What’s your impression of the Great Wall? ---Wonderful! Once ____ , it can never be forgotten.
____ that you are chosen to be a volunteer at the London Olympic Games, what will you do?
He didn’t regret saying what he did but felt that he ____ it differently.