Between 4.5 and 3.8 billion years ago, the earth became so ______ that it was not clear whether the shape would last or not.

 With the help of the firefighters, the people caught in the fire managed to escape to the safe place, ______.

The dress is not ______ for the formal party. You’d better find another one.

__________ hungry I am, I never seem to be able to finish off this loaf of bread.

 The Chinese Education Department suggests teachers should receive ______ education to catch up with the development.