Could you please open the door? ( to - не надо)
.....there was a king.....( вместо it - пишем there)
...for two years. ( вместо since - пишем for)
I will wash up!
It doesn't snow....
these mice ( множественное число mouse - mice)
You must not ask a lady.... ( don't have to меняем на must not)
...is my sister's friend..
Will he be happy...(порядок слов)
..... I have few coins...