基本语法。 1. There (be) fewer cars in the future. 2. She wants to be a (science) when she grows up. 3. We can see _______(hundred) of birds flying to the south. 4. There is ________(little) pollution in our city than last year. 5. I can do my homework by ________(I). 6. He lives in a tall ________(build) and goes up and down by elevator. 7. It took me an hour ________(finish) my homework. 8. In two hours Miss Yang ________(fly) to Paris. 9. Betty ________(write) to her parents the day before yesterday. 10. The _______(factory) produce(生产)many different kinds of toys for children.