[解析]
(1)C.推理判断题.由第二段As we set out,I was shocked at how narrow the path was可知,Bright Angel Trail不像他们所预料的那样可爱.它非常狭窄.故C选项正确.
(2)A.句意猜测题.由第二段As the sun rose higher,Arizona's famous heat seemed to roast (烘烤) us.There was no shade and our legs were aching.可知,路途出乎预料的艰难,太阳火辣,作者回来时必然是"软弱无力",故A选项切题.
(3)A.推理判断题.由倒数第二段But the smiles on our faces disappeared as the pilot tossed(翻转)the plane around,pretending he was going to hit the ground可知,作者和家人在乘坐飞机的时候,飞行员会做一些特别惊险的动作,使作者一家人心惊胆战,特别害怕.故A选项正确.
(4)C.推理判断题.由最后一段but personally I'd suggest a fourth:buy yourself a good magazine like National Geographic,作者建议买一本旅游杂志,这样既可避免日晒又可以避免精疲力尽.但这种方式根本不是旅游.故可知,作者是在开玩笑.C选项正确.