He was last seen _________in his office at about 7:15 p.m..
The teacher can _____ believe that Tom studies so ______.
---Would you _____ have tea or wine? ---______. I prefer coffee.
There’s _____ wrong with my computer. I’ll have it _____ .
Mr Liu is ____ unusual teacher. He has written _____ useful book for his students.
Are these parents?