Thousands of years ago people discovered the phenomenon by chance, and this was _____ the idea of the compass first came from.

We had much difficulty __________ home in the snowstorm.

A table is made _____ wood and paper is made _____ wood, too.[ ]

I find it astonishing that John ______ be so rude to me.— Not astonishing at all. He is always rude to others.

Tom kept quiet about the accident ____ lose his job.