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detectives were keeping guard at the door, two others opened the parcel. ? To their surprise, the precious parcel was full of stones and sand! 無憂 PPT整理發(fā)布 ? Answers: ? 1. Because they were expecting a valuable parcel of diamonds from South Africa. ? 2. They took the parcel to the the Customs House. ? 3. They found the parcel full of stones and sand. 無憂 PPT整理發(fā)布 Discussion ? Did the detectives save the diamonds? Why? 無憂 PPT整理發(fā)布 Language points ? 介詞搭配 ? at the airport ? a valuable parcel of diamonds from South Africa ? inside the main building ? on the airfield