---
title: "English C-Test B2: Artificial light at night · C-Test Prep"
description: "Free English C-Test at B2 level: \"Artificial light at night\", 25 gaps to fill in and check online, with the answer and an explanation for every gap."
canonical: https://ctestprep.de/en/c-test-english-exercises/b2-artificial-light-at-night
last_updated: 2026-10-31
---

# English C-Test B2: Artificial light at night

An English C-Test at B2 level: longer sentences with clauses and the passive, topics from study and society.

Last checked: 31 October 2026

25 gaps: 13 on grammar, 12 on vocabulary. Complete the second half of each word, then check; every answer with its explanation is under the text.

## Artificial light at night

B2

In many parts of the world, the night sky is no longer really dark. Street la___, illuminated si___ and l___ office buil___ produce a gl___ that c___ be se___ from f___ away, a___ in la___ cities on___ the brig___ stars rem___ visible. Th___ light poll___ is n___ only a pro___ for astro___. Many ins___ are attr___ to la___ and cir___ around th___ until th___ die o___ exhaustion. In humans, too, bright light in the evening reduces the production of melatonin, a hormone that helps us fall asleep.

### Answers and explanations: Artificial light at night

1. lamps Vocabulary
   "street lamps" = lights along a road; "lamps" = lights.
2. signs Vocabulary
   "illuminated signs" = signs with lights in them.
3. lit Grammar
   "lit" = with the lights on; participle of "light" used as an adjective. "large" also fits.
   Also correct: large
4. buildings Vocabulary
   "office buildings" = buildings full of offices.
5. glow Vocabulary
   "glow" = a soft, steady light.
6. can Grammar
   "can be seen": modal passive, "can" + "be" + participle; "could" is also possible.
   Also correct: could
7. seen Grammar
   Past participle of "see" (see – saw – seen) in the passive.
8. far Grammar
   "from far away" = from a great distance.
9. and Grammar
   Conjunction joining two parts of equal rank.
10. large Vocabulary
    "large cities" = big cities.
11. only Grammar
    "only the brightest stars"; "not only" = not just.
12. brightest Grammar
    Superlative of "bright": "the brightest".
13. remain Vocabulary
    "remain visible" = stay visible; plural, no -s.
14. This Grammar
    "This light pollution" points back to what was just described.
15. pollution Vocabulary
    "light pollution" = too much artificial light at night.
16. not Grammar
    "not only … (but also)".
17. problem Vocabulary
    "a problem for" someone.
18. astronomers Vocabulary
    "astronomers" = scientists who study the stars.
19. insects Vocabulary
    "insects" = small animals such as flies and moths.
20. attracted Grammar
    Passive "are attracted to" = are pulled towards.
21. lamps Vocabulary
    "street lamps" = lights along a road; "lamps" = lights.
22. circle Vocabulary
    "circle around" = fly round and round.
23. them Grammar
    Object pronoun "them" for the lamps (plural).
24. they Grammar
    Subject pronoun "they"; it refers to the insects.
25. of Grammar
    "die of" = die because of.

## Tips for B2

- At B2 you meet the passive, relative clauses and linking words such as "however" or "although" more often.
- Watch the word class: adjective or adverb, noun or verb. The start of the word alone is often not enough.
- Keep to about 6 minutes per text, as in the University of Münster C-Test.

## More practice texts

**B1:** [The semester ticket](https://ctestprep.de/en/c-test-english-exercises/b1-the-semester-ticket) · [Volunteering in your free time](https://ctestprep.de/en/c-test-english-exercises/b1-volunteering-in-your-free-time) · [Food waste in the canteen](https://ctestprep.de/en/c-test-english-exercises/b1-food-waste-in-the-canteen)

**B2:** [How vaccines are tested](https://ctestprep.de/en/c-test-english-exercises/b2-how-vaccines-are-tested) · [Citizen science](https://ctestprep.de/en/c-test-english-exercises/b2-citizen-science)

**C1:** [The printing press](https://ctestprep.de/en/c-test-english-exercises/c1-the-printing-press) · [The economics of streaming](https://ctestprep.de/en/c-test-english-exercises/c1-the-economics-of-streaming) · [The decline of handwriting](https://ctestprep.de/en/c-test-english-exercises/c1-the-decline-of-handwriting)

[Three more texts (B1, B2, C1) on one page →](https://ctestprep.de/en/c-test-english-exercises)

**Ready for the real test?** The English Pass (€12) has 10 more texts and a simulation in the Münster format: 4 texts, 100 gaps, 25 minutes, with an estimated level. [See the Pass →](https://ctestprep.de/en/pricing)

[The C-Test at universities compared →](https://ctestprep.de/en/c-test-english)