Tìm và sửa lỗi sai trong mỗi câu sau :
1) What's the matter by you ?....................................................................................................
2) Last Saturday, I am at Hoa's birthday party. .............................................................................
3) He likes watching TV. He watch it every day. ................................................................................
4) Mai is writeing a letter at the moment. ...................................................................................
5) I play sometimes football in the afternoon. .......................................................................................