SOLAR ENERGY DOESN'T CAUSE POLLUTION, BUT IT IS NOT CHEAP.A. EXPEN...

22. Solar energy doesn't cause pollution, but it is not cheap.

A. expensive

B. effective

C. commercial

D. possible

Read the following passage and mark the letter A, B, c, or D to indicate the correct

word that best fits each of the numbered blanks.

It is estimated that about three billion people use the Internet computer network around

the world. Most people use the Internet to (23) _______information or for entertainment.

A new study, however, shows US that almost 10% of Internet users are using it SO often

that it is seriously harming their lives. The study (24) _______that these people may find

it difficult to stop using the Internet because they have become addicted. Someone who is

addicted finds it extremely difficult to stop (25) _______activity. According to a

psychologist in the field. 30% of Internet users claim that they use the Internet to escape

from (26) _______or emotions. The study also shows that having a chat or discussion

with strangers on the Internet is one of the most (27) _______activities.