My brother lives in ______ on ______ floor.
If you keep on ignoring the teacher’s advice, you will probably get into a situation______ you fall behind others in all subjects.
I don’t know why she’s looking at me ______ she knew me. I’ve never seen her before in my life.
_______ English has changed a lot over time and _______ English spoken between about AD 450 and 1150 was quite different.
Suddenly he ____________his mother in the crowd and ran to her .
The world is ____________ five continents.