1. It's believed that mixed-ability teaching can _______________(促使他們知識的積累和經歷的豐富).
2. We _______________(使我們的行為符合別人的)based on a constant mental process of appraisal and interpretation.
3. The class are very active. They ________________(爭先恐后地回答問題).
4. Oxygen is ________________(一種能和許多物質化合的氣體).
5. Mr. Smith is ________________(這次事故的目擊者之一).