As Jack left his membership card at home, he wasn't allowed into the sports club.
I _____ give you this book today, but I forgot.
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.