The number of swimmers ______ getting larger and larger. Look, a number of students _____ swimming in this river.
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.