答案与题解：
1. C 本题的问题是：为什么说他们离开小屋的时间晚了?由第一段可以知道答案“It meant the day would be a hot one, and the warmth would loosen rocks that were gripped by ice. ”可知岩石的状况已经不是很好了，故此题的正确答案为 C。
2. A 本题的问题是：登山者讨厌斜坡的第一个原因是什么?由原文第二段可以直接得出答 案。“First, because it can easily be pushed off on to you by people climbing above. ”
3. B 本题的问题是：“Cailloux”这个词的意思是什么?由第三段后半部分与第四段开头可知 这个单词是石头滑落的意思。“it would pull towards me, like a drawer opening”“There were just two rocks at first, leaping and bounding down the face towards us, once cannoning off each other in mid-air.”
4. D 本题的问题是：在第四段男孩话语中讽刺的是什么?由第四段“‘Why? Because a rock in your face is far less pleasant than a rock on your helmet，’he told us. ‘Face in, always face in.’”可知正确答案为 D。
5. A 本题的问题是：Toby安全的标志是什么?由文中第五段“I looked across, he was safe beneath an overhanging canopy of rock. "可以得出答案。