求：新概念英语第二册lesson7 too late的课文

Lesson 7
Too late
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!
New words and expressions 生词和短语

detective n. 侦探
airport n. 机场
expect v. 期待，等待
valuable adj. 贵重的
parcel n. 包裹
diamond n. 钻石
steal v. 偷
main adj. 主要的
airfield n. 飞机起落的场地
gua