As early as 1647 Ohio made a decision that free, tax supported schools must be established in every town _____ 50 households or more.
It isn’t quite ___ whether the Tibetan antelope is still being hunted.
---Where’s the little elephant? ---It’s said it ___ in the hospital.
She wondered what use she would _______ this chance.
_____ learn more knowledge, the students stay at school on Sunday.
The two companies are competing ___ each other to get into the Chinese market.