10 years ago, _________ only one classroom building in our school. And in 10 years, _________ five classroom buildings in our school.
He _____ with a pencil. Now a pen _____ by him.
---Bill is a strong-minded boy. ---He sure is. He often says nothing can stop him _____ his dream.
There are so many kinds of mobile phones here. We can’t decide _____.
It took me about two hours to clean the house, My mother _____ what I did.
My cousin ____ the chance of working abroad and returned to his hometown.