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
单项选择题 25（）
单项选择题 22（）
单项选择题 "I suspect that your business will start that way too." in the last paragraph means（）
