China represents a huge opportunity to America, so it’s important for Americans to know _______ the Chinese work and think and to make strong friendships and connections with Chinese people.
The thought _____ they could cross the whole continent was exciting.
We watched, amazed as fire _____ on the outside of the spaceship as the earth’s gravity increased.
Walking does need a bit of practice _____ gravity has changed.
They multiplied and filled the oceans and seas with oxygen, _____ encouraged the later development of early shellfish and all sorts of fish.
_____ is even more important is that as the earth cooled down, water began to appear on its surface.