—The dictionary is a useful _______ for understanding new words.—I think so.A. plan B. tool C. way
Not everyone knows_____they want to be.
Science is _____ difficult for some students ____ learn, so many of them don’t like it.
---What are you doing? ---I’m_____my English book. But I can’t find it
For your health, you should eat_____vegetables and_____meat.
_____students went there.