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A travel blogger is sharing tips with first-time visitors to Japan. Help complete the advice by selecting the correct option for each blank.
"If you're visiting Japan, you _________________________ try the street food — it's absolutely incredible! You _________________________ speak Japanese, though, because many people understand some English. But you _________________________ eat on the train — it's considered very rude, and other passengers will be uncomfortable."
The correct answers are must, don't have to, and must not.
Must is used here for a strong personal recommendation — the blogger feels very strongly about it. Don't have to means speaking Japanese is not necessary — you can manage without it. Must not expresses prohibition — eating on the train is not allowed because it is considered rude. Notice the important difference: don't have to = it's not necessary (you have a choice), while must not = it's prohibited (don't do it!).