用所给词的适当形式填空
1. People don’t like others to ask about their             (person)things especially ages.
2.I met two             (foreign)on my way to the airport.
3. The man has a great number of collections. He is a famous             (collect).
4. Mother got             (annoy)when she saw her son playing with the sick cat.
5. Some students don’t listen to the teachers carefully so they usually fall         (sleep)in class.
6.—Would you mind not             (play)baseball here?
—Sorry. We’ll go and play in the park.
7.If you become rich, you will have a difficult time             (know)who your real friends are.
8. Your job will sometimes be very             (danger)if you play sports for a living.
9. The young should speak to the old             ( polite).
10.Reading             (be)good for us to learn English better.