He was last seen _________in his office at about 7:15 p.m..
—Do you like reading books? —Yes. Each of us to do more reading in and after class.
—We’ll make a trip to Hainan Island next weekend. Will you go with us? —No, I can’t _____ it at present.
—How many students are there in the classroom? —_____ .I don’t know where they have gone.
It’s wrong _____ you _______ the disabled people.
—May I go to the theatre with you? —I’m afraid not ____ you have a ticket, because I have only one.