Always take a basic medicine kit on holiday if / in case you fall ill., if, in case, If you pay for a full year's membership in advance, then / that you are entitled to a twenty percent discount on spa treatments., then, that, The show's next week. What are we going to do unless the tickets turn up / if the tickets don't turn up in time?, unless the tickets turn up, if the tickets don't turn up i, If the museum will charge / charges for entry, a lot of people won't be able to use it., will charge, charges, There will be / is a riot if the police don't establish control over the crowd., will be, is, If you were / Were you to listen more carefully, you might understand a little more., If you were, Were you, Had we known about the state of the hotel, we would never book / have booked it., never book, have booked, If flights to Cyprus weren't / aren't so expensive these days, they might have gone there for their honeymoon last spring., weren't, aren't, The regulations require that each defendant in turn submit / to submit a sworn statement to the court., submit, to submit, I don't like artificial fabrics. I'd rather wear / wore natural materials., wear, wore, Are you tired? You look as though you didn't sleep / haven't slept for days!, didn't sleep, haven't slept

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