A rson who believes that he is incapable will not make a real effort, because he feels that it would be useless. He won't go at a job with the confidence necessary for success. He is therefore likely to fail, and the failure will strengthen his belief in his incompetence. 一个认为自己能力不足的人，就不会全力以赴，因为他觉得那是徒然的。他不会有信心去承担一份要求成功的工作，因此，他亦趋向于失败，而失败又加强他认为自己缺乏办事能力的信念。 make a real effort--全力以赴 necessary for success--要求成功 therefore--因此 (这部份属整段的结论，故用therefore；其余三个答案— truly 确实，really 真的，however 然而—皆不切合文意。) strengthenhisbelief--加强他的信念(其余三个答案:1.leadto引致,这信念本来已有,故非“引致”; crease增加,与belief不符,3.Addto增加,亦与belief不符。) 这篇短文是说“缺乏自信心”与“失败的经历”彼此环环相扣，二者互为因果，起互相增上的作用。