Holiday is ______ time for leisure. But making good use of ______ time is not an easy task for most people.
Recycling is one way to protect the environment; reusing is ___.
— Why ,this is nothing but common vegetable soup?— _______ madam. It’s our soup of the day.
A serious study of physics is impossible _____ some knowledge of mathematics .
Three Long Island families forced to move by Hurricane Sandy have been ____ in fancy Manhattan apartments ever since free of charge.
He wrote a letter ___he explained what had happened in the accident.