______ is widely acknowledged that all mankind is created ______.

_______, or we will be late for the meeting! 

(2009福建顺昌模拟)——We can never forget the days _______ the two astronauts in spaceship worked together and the days ________ we spent together.

Recently there have been many occasions____ you have attended events on your own.

The earthquake in Japan, measuring 9.0 on the Richter Scale, was so violent         cause a series of explosions of the nuclear reactors in several power stations.