IT MAY BE CONCLUDED FROM THIS PASSAGE THAT.A. SIGNS, SIGNALS, SYMB...

45. It may be concluded from this passage that.

A. signs, signals, symbols and gestures are forms of communication.

B. symbols are very easy to define and interpret.

C. only some cultures have signals and symbols.

D. waving and handshaking are not related to culture.

II. Choose the best answer from A, B, C or D to fill in the gap in the following passage.

Everyone wants to reduce pollution. But the pollution (46)……is as complicated as it is serious. It

is complicated (47)……much pollution is caused by things that benefit people. For example, (48)

……from automobiles causes a large percentage of all air pollution. But the automobile (49)……

transportation for millions of people. Factories (50)……much of material that pollutes air and water,

but factories give employment to a large number of people.

Thus, to end (51)…… greatly reduce pollution immediately, people would have to stop using

many things that (52)…… them. Most of the people do not want to do that, of course. But pollution

can be (53)……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. Government can pass and

enforce laws that (54) ……businesses and (50)……to stop or cut down on certain polluting activities.