Sửa lỗi sai

sửa lỗi sai 
1 would you mind if i open all of the windows
3 Tom said that he is learning E in an evening class
4 Tom asked me how long does it take me to go to school by bike
5 A stranger asked me how far was it from my house to the school
6 i don't know where is he staying now
7 they left to Ha Noi in a beautiful morning
8 your window need to clean immediately . They are very dirty