embarrass( 使尴尬 , 使窘迫 )polish( 擦光 , 擦亮 , 修改 , 上润光剂 )emotional ( 情绪上的 , 情感上的 )efficiency( 效率 , 效能 )curb( 控制,抑制 )await( 等待 )donation( 捐助 )dump( 丢弃 , 扔掉 )stuff( 装满 , 填满 )historical( 有关历史的 ) 1. He has a special feeling for the brilliant birds, and each spring he eagerly ______ their return. 2. Thanks to the ______ of air transport, everyone is free to go anywhere at any time. 3. John believes that the ______ of food to the hungry is more helpful than giving money. 4. Mary was a careful speaker; every word seemed to have been ______ before it was allowed to escape through her lips. 5. When she heard it was snowing in the city they were going to, she ______ two more sweaters into her bag. 6. During our stay in Europe we visited many places of ______ interest, including several castles. 7. The wedding ceremony of my sister was a very ______ experience for our family. 8. He was ______ when he discovered that he didn't have enough money to pay for the red wine he had ordered. 9. The local government is pressed to find new places to waste. 10. The new system designed to ______ harmful emissions ( 排放物 ) from factories will be put into use soon. 10. The new system designed to curb ______ emissions ( 排放物 ) from factories will be put into use soon.