单项选择题
A．with a moment of sudden realization of inspiration B．with the knowledge of what is needed C．after you have climbed some muntains D．when you have climbed some mountains
What does the work "pest" in the second sentence of the...
单项选择题What does the work "pest" in the second sentence of the first paragraph mean（）
A．Harmful thing. B．Insignificant thing. C．Troublesome thing D．Trivial thing
Dawson was dissatisfied with soft iron pitons because （...
单项选择题Dawson was dissatisfied with soft iron pitons because （）
A．they were too soft to bear the climber’s weight B．they were the only pitons he could afford to buy C．they coul not last long D．they were made of iron
21（）A．usedB．usingC．to useD．use
单项选择题21（）
A．used B．using C．to use D．use
