1)If I wasn’t able to avoid a mistake, chances were that no other surgeon could have, either. 2) I think it is very unlikely that he will get the job; however, it may be worth a try.
3) I feel sure that if I had come from a different background, and had really been unemployed, there is every chance that I would have been found guilty (有罪).
4) If you try to pass the problems by, it would be impossible for you to make any progress in this field.
5) Then you might as well (完全可以) make a little money from them.
