Are Mr. and Mrs. Wang living alone in the house? —-Yes, altough they have three sons, of them live with their parents.
When the teacher came into the classroom, the students ____ in groups.
Look! The young man _____ is in blue looks like Mr. Clark.— I think so. [ ]
He _______ all his money _______ to charity after he died.
I am very sad that I ______ many chances in the last few years.