单项选择题
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
A.I doubt you will start a business in the same way B.I don't believe your business will succeed if you start that way C.I think it is likely you start a business that way D.I have no idea if you will start a business that way
A.you have brought the wrong documents with you B.your ferry has just left without you C.the nearest phone is out of order D.a repair to your car might take some time