The Olympic Stadium in London was opened May 5.
Don’t _______too late, or you will feel tired in class tomorrow.
--- Have you _______it?’ ---Sorry. Would you please explain it for a second time?
I have no doubt in my mind _______ they will be glad to see me.
---Jack,you look tired today. What’s wrong? --- I was _______ busy _______ I didn’t go to bed until midnight yesterday.
After a week,he_______ good ideas to solve the problems.