----There are sixty students in our class, and _________of us are boys.----Wow! You have forty girls.
This question sounds _____ than that one.
Health is very _____and every student knows the _____of keeping healthy.
Our country _______ a lot in the last fifty years.
She said she had some trouble ___________ her homework.
---Is the notebook Carla’s?---It _____be hers. It has Mary’s name on the cover.