The house rent is high. I've got about half the space I had at home and I'm paying ______ here.
He looked as though he _________ a ghost(鬼).
He stood for an instant with his hand still ___________.
_____ is known to all, the age _______ children can go to school is seven.
He told me that he was very familiar _______ the surroundings there and I told him that the people there were familiar _____ me.
. When the teacher came in, the student pretended ________ his lessons.