---- Where will you start your work after graduation, in the south or in the north? ---- Mm, it’s not been decided yet. I _____ continue my study for a higher degree.
The dictionary written by Professor Wang is worthy __.
I prefer ___for an outing by bike rather than __ at home on Sunday.
“What did the teacher tell you to do? ” “I have to write a __ composition.”
She searched ___.
Every means ___ the river from being polluted.