新概念英语 - 小编笔记
新概念英语 - 教材原文
The plane was late and detectives were waiting at the airport all morning. They were expecting a valuable parcel of diamonds from South Africa. A few hours earlier, someone had told the police that thieves would try to steal the diamonds. When the plane arrived, some of the detectives were waiting inside the main building while others were waiting on the airfield. Two men took the parcel off the plane and carried it into the Customs House. While two detectives were keeping guard at the door, two others opened the parcel. To their surprise, the precious parcel was full of stones and sand!
新概念英语－单词和短语1 detectives were waiting at the airport all morning, 侦探们在机场等了整整一上午。句中的动词时态是过去进行时。过去进行时常用来表示过去某时正在进行的情况或动作。本课课文中有4个句子使用了过去进行时。参看第1册第117-119等课中的例句。
2 keep guard, 守卫。
3 to their surprise,使他们吃惊的是。