Parts 2, 3, and 4

Change active sentences to passive ones and passive sentences to active ones.

1		New technology has revolutionized the communications industry.
2		In many offices and homes, typewriters have been replaced by word processors.
3		Fifty years ago, secretaries typed letters.
4		Computers are being used by many cities to help regulate traffic.
5		Ten years ago, cities were using traffic officers to regulate traffic.
6		Today we can use computers to write letters.
7		Computers may be used by writers to help them do research.
8		A doctor might use a computer to get the latest information about a drug.