We all have an idea about the common types of environmental problems．However，light pollution may he a（n）（41）
term to many of us．But，the fact is，it does（42）
mankind，other living forms and the environment as a whole．
Light pollution （43）
all forms of the misused man-made light．It is（44）
when artificial light sources brighten certain areas，which do not（45）
lighting．It can be office lighting，car（46）
，street lights and many more．
Light pollution is（47）
to both animals and human beings．Upon studies．obvious effects observed in the．（48）
of animals which are active at night．It is found that （49）
light at night makes it difficult for these animals to（50）
，wander and perform their regular activities As to human beings，light pollution is directly or indirectly（51）
for causing several diseases．Its effects are related to（52）
，in the body clock．It contributes to（53）
of developing cancerous cells．So，it's nothing less than a （54）
human health．
Apart from this，the actual（55）
of misused light is about millions of dollars every year．It also leads to the release of greenhouse（56）
and global warming．After all，fuels are used for Producing（57）
in all countries．
While outdoor lighting is part of our （58）
lifestyle，some simple ways will surely help inreducing light pollution．For example，while（59）
outdoor lighting，make sure that they are pointed downwards．Also，（60）
only the required lighting equipment for both home and of-feces．
| 41．A．familiar | B．new | C．good | D．usual |
| 42．A．punish | B．benefit | C．affect | D．change |
| 43．A．represents | B．measures | C．handles | D．describes |
| 44．A．obtained | B．managed | C．noticed | D．resulted |
| 45．A．provide | B．receive | C．require | D．admit |
| 46．A．waste | B．headlights | C．horns | D．noise |
| 47．A．poisonous | B．practical | C．ordinary | D．harmful |
| 48．A．behavior | B．hobby | C．anxiety | D．intention |
| 49．A．dark | B．plentiful | C．little | D．bright |
| 50．A．sleep | B．rest | C．hunt | D．feed |
| 51．A．flexible | B．responsible | C．meaningful | D．suitable |
| 52．A．disturbance | B．confusion | C．reaction | D．balance |
| 53．A．ideas | B．feelings | C．ways | D．risks |
| 54．A．start | B．threat | C．stress | D．shock |
| 55．A．need | B．price | C．cost | D．cure |
| 56．A．plants | B．smoke | C．gases | D．smell |
| 57．A．electricity | B．light | C．warmth | D．money |
| 58．A．healthy | B．modem | C．traditional | D．homely |
| 59．A．removing | B．repairing | C．cleaning | D．installing |
| 60．A．use | B．keep | C．save | D．make． |