--- Where did you get to know him?--- I think it was in the factory______ I worked ten years ago.
Many new means__________ to prevent the river ____________.
I like _____ in the spring when the weather is warm and everything begins to grow.
Is it to hold the 2010 World Exhibition _______ makes Shanghai the focus of the world?
We can never expect bluer sky unless we create less polluted world.
My headache is killing me.I it away.But now it’s getting worse and worse.