1. 组成：这支医疗队由五名医生和三名护士组成.(be made up of) 69. 世界是由物质构成的.(consist of) 70. 没有他的及时帮助,我不可能克服那么多困难.(but for) 71.听到这不幸的消息,她禁不住哭了起来.(on hearing...) 72. 对学生来说,
2. 由......组成：be made of由......制成(物理变化) | be made up of由......组成 | be mixed up混杂,混在一起
3. 由......构成,由......组成：look up to尊敬,敬仰 | be made up of由......构成,由......组成 | make up for补偿,弥补
4. 由......组成,由......构成：be made from 由......制成, 由......构成 | be made up of 由......组成,由......构成 | be proud of 为......感到骄傲、自豪