The climbers have prepared well. They ______ reach the summit safely. (deduction – certainty), must, might, should, You ______ take extra water when hiking in the mountains. (advice / recommendation), should, mustn’t, could, He left his jacket at home. He ______ regret it later. (possibility / prediction), might, must, shouldn’t, The trail is slippery. You ______ walk carefully. (obligation / necessity), must, might, could, They arrived very late. They ______ have missed the last cable car. (deduction – past event), could, should, must, They arrived very late. They ______ have missed the last cable car. (deduction – past event), must have, could, should, He didn’t bring any maps. He ______ have gotten lost if he wasn’t careful. (past possibility / prediction), might have, mustn’t, should, You ______ have forgotten your climbing equipment — it’s essential. (past obligation / regret), mustn’t have, could, shouldn’t, She left early. She ______ have missed the worst of the storm. (past possibility / speculation), might have, must have, should have, They didn’t check the weather forecast. They ______ regret going out in a storm. (possibility / prediction), might, must, should

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