Complete the sentences with the comparative form of the adjective. 1 Amy's hair is longer (long) than Elena's hair. 2 Elena wants to climb the _________ (low) wall. 3 Walking is _________ (safe) than kayaking. 4 Cycling is _________ (easy) than climbing. 5 The higher wall is _________ (exciting) than the lower wall. 6 Elena is _________ (good) at climbing than Tom.