Seeing a volcano erupt (喷发) is a wonderful experience, and you can really feel the heat by climbing to the summit (山顶) of Pacaya for a close – up view. There are guided tours every day up this highly active volcano from Antigua, giving travelers a chance to see Mother Nature at her most powerful.
Pacaya is an easy drive from Antigua, a beautiful city with many colorful houses along its old streets that are turned into art – works during its Holy Week festival. No matter when you come to Antigua, you won’t miss the Pacaya – tour companies.
But climbing Pacaya is no easy job: it is 2560 metres high, and reaching the summit takes two to three hours of seemingly one – step – forward and two – step – back movements. As you climb, you hear the dull sounds of eruptions high above. Steaming, hot remains from recent eruptions begin to line the path as you near the active summit: the McKenney Cone (火山锥). Just as though you were going to walk over to the edge of the cone, the road turns to the left and up to the relative safety of the old, inactive summit.
Many tours are timed so that you arrive at the cone of the volcano in plenty of time for sunset and the full contrast between the erupting red lava (熔岩) and the darkening sky. On a good day the view from the summit is extremely exciting. The active mouth boils, sending red lava over its sides, and once in a while shoots hot streams up to 100 metres into the air. There is a strong bad smell in the air even if you take care to be upwind of the cone. As evening turns deeper into the night, the burning lava quietly falls down the side of the volcano. For you, too, it is time to get down.
70．Climbing to the McKenney Cone, people will .
A．walk directly to the active summit
B．hear the continuous loud noise from above
C．make greater efforts than to other summits
D．see a path lined with remains of earlier eruptions

选什么，为什么？我觉得答案是错的！

Steaming, hot remains from recent eruptions begin to line the path as you near the active summit: the McKenney Cone (火山锥). 注意这句了吗？在你接近活火山的山顶——火山锥时，蒸汽以及早期火山喷发所产生的火热岩浆残骸开始在道路上散布得到处都是。而D选择，接近火山锥时，你会看到一条满是早期火山喷发产生的岩浆残骸的路。所以，应该是D答案哟

至于B的错误，并非只有在接近火山锥的时候才可以听到声音，只要你去爬活火山，dull sound 都会从上边传下来的。题干强调了是接近火山锥的时候哟