10 passages, each with six single-answer multiple-choice questions. Choose the option (A–D) that best matches the passage. The reason appears instantly.
Passage: “Caffeine blocks a chemical that makes us feel sleepy, which is why it keeps us alert.”
Question: How does caffeine keep people awake? A) by adding energy · B) by blocking a sleep chemical · C) by speeding the heart · D) by raising temperature.
Answer: B. The text says caffeine “blocks a chemical that makes us feel sleepy.” The other options aren't the mechanism the passage gives.
Pick one option per question. Feedback appears the moment you choose.
Carry into the mock: answer the exact question asked, and choose the option the passage truly supports — not the one that merely repeats its words.
Practise under exam pressure → IELTS Mock Test (Reading) (links to the full Mock once deployed)