Exercise Twenty-Five
1. It's believed that mixed-ability teaching can _______________（促使他们知识的积累和经历的丰富）.
2. We _______________（使我们的行为符合别人的）based on a constant mental process of appraisal and interpretation.
3. The class are very active. They ________________（争先恐后地回答问题）.
4. Oxygen is ________________（一种能和许多物质化合的气体）.
5. Mr. Smith is ________________（这次事故的目击者之一）.
1. enrich their knowledge and experience