Last fall I hung outside my window a bird feeder（喂鸟的食槽）. Knowing 1 about wild birds, I 2 that 3 I hung this bird feeder outside, numbers of beautiful birds would be swooping （飞扑） to my new addition. However, days, weeks, and months 4 , NO BIRDS. I asked so many people what to do? 5 was I doing wrong? “Nothing,” most of them replied, “just 6 !” So I waited and waited and waited, trying everything 7 to attract these birds. I cleaned off the deck （平台）, 8 the feed, and washed the feeder. I 9 made