When you're in a library you _________ turn off your phone.Group of answer choicesmusthavedon't has

To choose the correct option for the sentence, "When you're in a library you _________ turn off your phone," we need to analyze the context and the meanings of the options available.

1. Understanding the Context: The statement suggests an obligation or necessity if you are in a library. Typically, in a library, it is considered respectful and often a requirement to keep noise to a minimum, which includes turning off mobile phones.

2. Option Analysis:

   • must: This indicates a strong obligation. In the context of being in a library, this fits perfectly because turning off your phone is generally required.
   • have: This is not grammatically correct in this context and doesn't express the obligation.
   • don't: This suggests a negation, which does not fit the context of the sentence where an obligation is implied.
   • has: This is also grammatically incorrect in this context as it does not align with the subject "you."

3. Conclusion: Given the analysis, "must" is the only option that fits grammatically and contextually.

Final Answer

"When you're in a library you must turn off your phone."