Read the following passage about How Light Pollution Threatens Our Stars and mark the letter A, B, C or D on your answer sheet to indicate t...

Read the following passage about How Light Pollution Threatens Our Stars and mark the letter A, B, C or D on your answer sheet to indicate the option that best fits each of the numbered blanks from 18 to 22.

The fast disappearance of stars from our night sky is becoming a serious environmental problem that needs immediate action. According to Globe at Night's research project, artificial lights have been increasing quickly; (18)_________. Had governments created better lighting rules earlier, this natural heritage might have been saved for our children. The study, which collected data from thousands of volunteers worldwide, showed that people on the ground often notice what satellites cannot see. Modern LED streetlights send out blue light sideways, creating a growing bubble of brightness over cities. (19)_________. Professional astronomers find it harder to observe space, as too much light disturbs their telescope work and research activities. Additionally, local communities lose their traditional ways of finding directions and cultural stories when stars disappear from sight.

The research results offer practical ways to reduce this problem effectively. Cities could install covered lights (20)_________. Also, warmer-colored bulbs would decrease harmful effects on both human health and animal behavior patterns clearly. Education programs must teach people about this issue; (21)_________. The night sky, a natural resource belonging to everyone, needs protection through community work and smart policies. (22)_________, unfortunately, is that many people will never see the amazing dark sky full of stars that inspired old civilizations and still makes humans curious about space today.

https://www.nsf.gov/al

Question 18:

A. as a result, people may notice the Moon more clearly in many large cities

B. therefore, future generations may see many fewer stars above them

C. consequently, the night sky will look different, even though the number of stars remains the same

D. herefore, scientists can now measure light pollution more accurately than ever before

Question 19:

A. Having increased sky glow over cities, the new LED lighting makes it difficult to see faint stars at night

B. Urban areas where LED streetlights are widely installed often experience brighter nights than before

C. It's explained that this problem harms nocturnal animals and damages systems everywhere

D. The blue light, which spreads across the sky above cities, disrupts natural nighttime behavior in many species

Question 20:

A. that are pointed downward instead of letting light spread upward without control

B. that point downward instead of letting light spread upward without control

C. that have pointed downward instead of letting light spread upward without control

D. that point upward instead of letting light spread upward without control

Question 21:

A. as a result, citizens will not only understand the issue but also support effective policies

B. otherwise, citizens may demand brighter streets, even when the sky becomes harder to protect

C. therefore, citizens will understand light pollution’s serious problems better than before

D. otherwise, citizens will not understand light pollution's serious problems

Question 22:

A. What happens when towns are working together on better lighting methods

B. What will happen if towns work together on better lighting methods

C. What will happen without towns working together on better lighting methods

D. Why many people will never see the dark sky that inspired earlier civilizations