每句只有一处错误，请在错误词下划线并改正(可直接在答题卡上答题)。
The children must be taken good care.
When class begins, all students enter into the classroom.
Think of a situation which the expression can be used.
The Winter and the Summer Olympics are held every four years on a regularly basis.
She married to a man whom she didn’t like.
The problem deserved to considering.
A new hospital is built in our city now.
He is such clever that all his classmates like him.
Sometimes they may play to passer-by in the street or subway.
The computer have used in offices and homes since 1970s.