It is said that our school is ______ 72 classes, not including international classes.
It is often said thatteachers havevery easy life.
In ____late 19th century, Europe changed ______great deal and was playing important roles in ______international trade.
People think that ______ opening ceremony of the 29th Olympic Games is _____ great success.
— Is Mr. Smith rich? — Yes, very rich. When he worked in ________town, he earned a lot. Now he has a big farm in ________ country.
In science fiction we read of flying saucers travel through _____ space, so people want to have ______ better knowledge of the universe.