John isn’t happy today. Let’s go and ____.

The young teacher found it hard to _____ his explanation in class to most of the class. [ ]

ahas more than fifty states, ______, Kentucky, is the place _______ AbrahamLincoln was born.

Mary couldn’t________ the terrible working conditions in that factory and resigned last week.

Had you taken the doctor’ s advice yesterday, you _____ all right now.[ ]