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In the peak season, travellers _______ book their accommodation in advance.

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The project work in this semester is optional, so students _______ do it.

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This is a closed-book exam, so you _______ use any reference books in the examination room.

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Students _______ go to school on Sundays; there is no class then.

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Lots of teenagers are so stubborn and refuse to ____ their parents' advice.

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Parents should be ____ by offering guidance to kids without forcing their decisions on them.

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Mr. John is an engineer and expects his son to follow ____ his footsteps.