Choose the correct question tag to complete the sentence:
No one in the hostel heard the fire alarm last night, ________?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → did they
Question tag after “no one”:
“No one” makes the sentence negative, so the tag is positive. In the tag, “no one” becomes “they”. “Heard” is in the simple past and has no helping verb, so the tag uses “did”.
Complete sentence: No one in the hostel heard the fire alarm last night, did they?
Why the Other Options are Incorrect?
Option 1: didn’t they — Incorrect. This is a negative tag. It goes with a positive sentence. Example: The students cleaned their rooms, didn’t they?
Option 2: have they — Incorrect. “Have they” goes with a negative sentence that has “have” as its helping verb. Example: The guests haven’t eaten yet, have they?
Option 4: do they — Incorrect. “Do” goes with a present verb. Example: Your neighbours don’t keep pets, do they?