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Help the anxious supervillain double-check the details of his evil plan by selecting the correct question tags.
"The doom-laser is fully charged, _________________________? We haven't forgotten to feed the laser-sharks, _________________________? And nobody knows about the secret trapdoor, _________________________?"
The correct answers are isn't it, have we, and do they.
Question tags usually use the opposite polarity of the main sentence (Positive sentence $\rightarrow$ Negative tag; Negative sentence $\rightarrow$ Positive tag).
- "The doom-laser is" $\rightarrow$ "isn't it?"
- "We haven't forgotten" $\rightarrow$ "have we?"
The last one is tricky! "Nobody" is a negative word, so the sentence is negative, requiring a positive tag. Furthermore, indefinite pronouns like "nobody", "somebody", and "everyone" take the plural pronoun "they" in question tags, which means we must use "do" instead of "does".