There was another bag of brown dirty skin at the back of it.

it was difficult because of the hard resin____the skin. It was difficult because of the hard resin _____ the skin. One day,Mr.brown look out of his window,there was a boy at a sit at the back of the back at the back of用法 Mrs.Brown was having a lot of trouble with her skin,so she w Mrs.Brown was having a lot of trouble with her skin（皮肤）,so s The small river in front of my house was dirty before,but it at the back of 和at back of的区别 英语翻译The brown blotches of the benevolent skin cancer the sun 连词成句:of end the bed is a there bag at the ) at the back of in the back of behind区别