— It hasn’t been decided yet _______ our wedding party will be held.
His health had_____ while he was in prison.
We should never _____ ourselves with a little book knowledge only.
The substance can be added to gasoline to ______ the speed of automobiles.
It’s hard for the young people to imagine what _____ conditions their parents once lived under.
Chinese farmers are mostly living a simple and _____ life as it is today.