We can’t live without________/'wɔ:tər /. Don’t waste it.
Not only his parents but also his brother____ to the Summer Palace. They haven’t been back.
I prefer _____ shopping to _____ at home.
Not all the students would rather______computer games than_______
The railway_______Qinghai to Tibet is the longest plateau (高原) railway in the world.
If we don’t study hard, we will in our class.