—Do you know where Mary is?—No, I don’t. I ______ her since last Sunday night.
By around 900 AD,there were many places in Northern Europe______the Vikings chose to live.
Our meeting room is ______ theirs.
— Where is the hospital?— It’s about 500 meters ______ the school.
As we all know, the advantage _______ is good for students’ self-improvement.
_____in bed, he to me:“The hen has an egg.”