-- _____is that used for?---_____ the floor.
Students in this school don’t have classes on Wednesday afternoon, which is , for teachers have a meeting.
It is required that the students mobile phones in their school, so seldom them using one.
— Could you please wait for a while? — . I'm not in a hurry.
. Our club, which I mentioned just now, is open to all, age or sex.
He kept smiling secretly and we were all wondering that made him so happy.