1、run out/run out of1、room/spaceroom,space 都可以用作不可数名词，表示“空间，余地”。另外，room有“房间”之意，可数；space有“太空”之意，不可数。常用短语：live a room 5 住在5号房间；three rooms 三个房间；in space 在太空；take up much room 占很多空间；standing room 立足之地；单句改错There is much rooms for improvement in our work.There isnt enough spaces in this classroom for 30 de
2、sks.The universe exists in the space, as we all know.Key: 改rooms为room 改spaces为space 去掉space前的the2、run out/run out of二者均表示“用完、耗尽”，但run out 不及物，同give out, run short；而run out of 及物，相当于use up, run short of。对比：Money is running out. 钱快用光了。Were running out of money. 我们的钱快用光了。All the money has given out./Al
3、l the money has been used up. 所有的钱已花光。The oil is running short. 油快用完了。He is running short of oil. 他快把油用完了。一句多译：两周过去了，他们的食品用完了。Key:Two weeks passed, and their food ran out.Two weeks passed, and they ran out of the food.Two weeks passed, and their food gave out.Two weeks passed, and their food had bee
4、n used up.Two weeks passed, and their food ran short.Two weeks passed, and they ran short of the food.3、save/rescuesave 意为“救、挽救”，是普通而含义广泛的常用词。指通过救援不但使受害者（人、动物或物）能脱离危险或祸患，而且使其在今后能安全地生存下去。有时可与rescue通用。如:He operated on her at once, and Edisons mother was saved.They fight against the enemy to save their country.rescue 意为“救、营救、挽救”，多指在直接的危险或祸患中给予迅速而有效的救援，一般指救人。如：Helicopters were sent to rescue them, but it was impossible for them to get close enough.
