China, ____ one of the great four countries with ancient civilizations, is best-known _______ its great development in all the fields over the years.

________ the Internet is bridging the distance between people, it may also be breaking some families or will cause other family problems

The expert’s theory, _____ my opinions were based,proved right in the end.

The five rings on the Olympic flag________the union of the five continents and the meeting of athletes from all over the world

I hate people _______ talk too much but do little.