1. Social activities        (保護(hù)) old people from the loneliness.
2. Money and other forms of help will be offered to the        (受害者) of the flood.
3. The doctor noticed a         (逐漸的) improvement in his patient.
4. Many a person        (目睹) the car accident.
5. An idea        (想到) to me that I should turn to my former teacher for help.
6.        , he was lying,for his face was red.
7. As students, we should make full use of our         time.
8. Our foreign trade has         during recent years.
9. A crowd         to watch the interesting game.
10. We have a         in exploring space after the rocket "change" was sent into space.