用embarrass ,polish,emotional,efficiency,curb,await,donation,dump,stuff,historical的正确形式填空 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.