Put the verbs in brackets in the correct tense, Past Simple, Present Perfect, or Present Simple, active or passive. Mount Everest and K2 (1) are belleved (believe) to be the two highest mountains in the world, but they (2) (3) (be) very different. Everest (climb) for the first time in 1953, and since then thousands of people (4) (5) (stand) on the summit. You (not need) to be a professional clim

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