We tried to find a table for seven, but they were all __________.
—Sorry, sir. I'm late again.—What excuse will you __________ for yourself this time?
This box __________ all the books you need, __________ an English-Chinese dictionary.
We'd better set off or it will be dark __________ we know it.
I ___________in the No.8 Middle School for three years, and I have been in this school for one and a half years.
Preparations are being made for the Olympic Games ______ in Brazil in 2016.