Your new flatmate left you a note on the fridge. Choose the correct words to complete it! 🧹

"Hey! A few things about the flat: We have to take the bins out every Thursday — the council collects them Friday morning. You don't have to clean the bathroom today because I already did it this morning. Oh, and the landlord said we must keep the front door locked at all times. Safety first! 🔑"

The correct answer for the first blank is have to.

Have to is used for an external obligation — the council sets the collection schedule. Note: "must to" is never correct.

The correct answer for the second blank is don't have to.

Don't have to means there is no necessity — the bathroom is already clean, so it's not needed.

The correct answer for the third blank is must.

Must is used here because the landlord is giving a strong, direct instruction about safety. Both "must" and "have to" can express obligation, but "must" often reflects the speaker's/authority's strong personal insistence.