It’s more and more important to protect our earth—-I think soIf everyone ______a contribution to it, our world will be more beautifu.

________ is no doubt _______ Mo Yan, this year’s Nobel Prize winner in Literature, ever did so much on his way to success

Thousands of years ago people discovered the phenomenon by chance, and this was _____ the idea of the compass first came from

The paper fish is really beautiful! Can you show us ______ you make it?

The teacher told us that light _____ much faster than sound.