It is not socially ______ for parents to leave children unattended at that age.
you can borrow my car you promise not to drive too fast.
Not until____ did Humphrey begin working.
21st Century, ____weekly newspaper, provides us with____variety of fresh articles about campus studies and life.
His first book ______ next month is based on a true story of his family.
People who are ______ modern city life may think it is rather dull to live in the countryside.