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1—5 ACCBA 6—10B B A C B 11—15 A B B C C 16—20 B B A A C 21—25 D B A C C 26—30 D A B D B 31—35 B A B A B 36—40 B A B C D 41—45 A D B C C 46—50 A D C A A 51—55 A B B C A 56—60D B C A D 61 voice 62 off 63instead 64 remind 65 succeeded 66 borrow 67 largest/ biggest 68achieve/ realize 69If don’t 70 took her 71 What doing 72 Did try 73 with 74 depend 75 teaches 76keeping 77 dropped 78 better 79 It’s 8844.43 meters high. 80你越接近山顶，呼吸就越困难。 81 Because people want to challenge themselves in the face of difficulties. 82 Qomolangma—the most dangerous mountain in the world? | 
