Kids are not allowed to leave kindergartens their parents come to pick them up.
As you ______ new words in context, it is a very good method for you to guess their meanings.
Charles Babbage is generally considered ____ the first computer.
Look at the trouble I am in. If only I _____ your advice.
This is ____________you are mistaken.
Was it in the village ______ we used to live in _________ the accident happened?