Why caffeine doesn't affect some people — Reading comprehension exercise
B1 / B2 / C1This B1 / B2 / C1 English reading comprehension exercise focuses on “Why caffeine doesn't affect some people.” Read the article, then answer the questions below to practice identifying key details, meaning from context, and overall understanding.
STEP 1 - Read the following article: READING COMPREHENSION ARTICLE 39
STEP 2 - Answer these questions (choose the best answer):
1. Ultimately, what determines whether or not caffeine affects an individual?
That's right! Well done!Sorry, that is incorrect. Please try again.
2. Most people will feel caffeine for at least _______________.
That's right! Well done!Sorry, that is incorrect. Please try again.
3. People with a lot of adenosine receptors are _______________ to the effects of caffeine.
That's right! Well done!Sorry, that is incorrect. Please try again.
4. According to the research of Ahmed El-Sohemy, what percentage of people are 'quick metabolizers' of caffeine?
That's right! Well done!Sorry, that is incorrect. Please try again.
5. According to the article, drinking lots of caffeine might actually _______________ adenosine receptors.
That's right! Well done!Sorry, that is incorrect. Please try again.
Did you know?
Caffeine sensitivity varies between individuals partly because of genetic differences in how quickly the body processes it. Science articles like this are a good way to build vocabulary for talking about research studies, genetics, and everyday health topics.
Keep Practicing — More Reading Exercises for You:
Reading comprehension is one of the best ways to build vocabulary and improve your exam score — try these other passages next.
California helping vulnerable mentally ill people to get help (B1/B2/C1)
Would Republicans still vote for Trump if he was convicted? (B1/B2/C1)
The low-key richest man in the world (B1/B2/C1)
Illegal vapes in the USA (B1/B2/C1)
How dolphins talk to their young (B1/B2/C1)
Browse all reading comprehension exercises →
California helping vulnerable mentally ill people to get help (B1/B2/C1)
Would Republicans still vote for Trump if he was convicted? (B1/B2/C1)
The low-key richest man in the world (B1/B2/C1)
Illegal vapes in the USA (B1/B2/C1)
How dolphins talk to their young (B1/B2/C1)
Browse all reading comprehension exercises →
Premium Resources
More great stuff
American idiomsPhrasal verbs
Varieties of English
Travel English
Language-specific grammar
Connect & follow
About us /
Cookie & privacy policy /
Contact: info (at) learnenglishfeelgood.com
© 2006–2026 LearnEnglishFeelGood.com unless otherwise stated.
Reposting our content online is not allowed. See our content policy.