_____ 2/ _____ 3/ _____ 4/ _____ 5/ _____ 6/ _____ (23-28) CHOOSE THE WORD OR PHRASE THAT BEST FITS THE BLANK SPACE IN THE FOLLOWING PASSAGE

1/ _____ 2/ _____ 3/ _____ 4/ _____ 5/ _____ 6/ _____

(23-28) Choose the word or phrase that best fits the blank space in the following passage:

Everyone wants to reduce pollution. But the pollution (23)___________ is as complicated as

it is serious. It is complicated (24) ________ much pollution is caused by things that benefit people.

For example, (25) ___________ from automobiles causes alarge percentage of all air pollution.

But the automobile (26) ________ transportation for millions of people. Factories (27) _________

much of material that pollutesair and water, but factories give employment to a large number of

people. Thus, to end or greatly reduce pollution immediately, people would have to stop using

many things that benefit them. Most of people do not want to do that, of course. But pollution can

be (28) __________ reduced in several ways. Scientists and engineers can work to find ways to

lessen the amount of pollution that such things as automobiles and factories cause.