they __to enter the building by the back door:however,the fr
they __to enter the building by the back door:however,the fr
They——to enter the building by the back door; howerve,the fr
Please enter the house by the back door.
I enter the building ____ the side door.
They're____knocking at the back door(尝试)
they are ____koocking at the back door
He entered the building by a side door.
by the back door中by的意思
1、They went the back door into the garden.
Where are the desks?-They __to the second floor by two boys.
Nodody can enter the building without p___
Noboby can enter the building without p___