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An important rule in Tim's family is that they have to pay ____ visits to their grandparents in the countryside.

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

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Many teenagers do not like it when their parents impose their decision ____ them.

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

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

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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 _______ cheat in the exams; it is against the rules.

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