---If there are _____people driving, there will be ______air pollution.---Yes, the air will be fresher and cleaner.
The young woman sings as as the singer.
I want to buy a hat, but there are so many kinds that I can’t decide to take.
Many students think hard to learn English well.
There are about five people in the town, mainly the old and children.
—I don’t know much about computer. —I don’t know,. Let’s go and ask our computer teacher for help.