The problem is not _____ easy. Think _____ over.
You can go out _____ you promise to be back before 11 o’clock.
There are forty five students in our class, and they are _____ interested in football.
It is too early in the _____ to expect many visitors to the city.
Don’t _____ to correct me if I made a mistake.
I am glad that the Olympic Games will be held in 2008 in China, _______ ?