人教的：1.a piece of paper,two piece of paper,papers=newspaper,less paper 2.on the tree,in the tree,3.live in 4.fly-flew
fly to the moon 5.feel-felt ,fall-fell 6.live alone =
I live by myself .7.lonely孤独的 8.keep a pet
9.disable不能 10.sound 和vois的区别