The biggest cities in Canada only have about six million people while _______ in China are much larger.
-Water is the most precious resource in the world. -So the government________every one of us to save water.
We can hardly imagine Tom________the heavy task in a single day.
The man was quite________of the danger;he had no choice but to face it.
They pulled down the old buildings for the________of making room for the newlybuilt motorway.
If you are worried that the tickets will be sold out,you can buy a ticket________.