1. —You like the new house, why not buy it?
    — It's really expensive.I can't a_______ it.
2. In the modern world, it's n_______ for us to learn English well.
3. The boy has tried to make his mother pay more a_______ to him.
4. Mr. Green has got his driver's l_______. He can drive a car.
5. — Do you know who d             America?
    — Columbus (哥伦布).
6. We all regard that_______ (友谊) is the most important in the world.
7. You should be _______ (有耐心的) to wait for him.
8. His idea often _______ (影响) his decisions.
9. If Lucy is given a chance, she will _______. (成功)
10. We must know the ______ (重要) of learning English.