--- It is weeks since he ___. ---So it is. We’d better ask some one else to help us.
Mr. Chang is not only a teacher, ___ a writer.
In our school only teachers are allowed to use this room. And only in this room __ find some good dictionaries.
My friend, Tom, bought __ oar.
Please come here ___ four days.
“Mom, I am full.I can’t eat any ___.”