GMAT考试对于考生的基础知识的要求是比较高的，这点在GMAT阅读题里非常的明显。做阅读题没有好的基础是做不下去的，今天给大家讲解一下doing的使用技巧。希望大家在做阅读题的时候能顺利的掌握这些GMAT阅读技巧，顺利拿下考试高分：
GMAT考试doing第一类是出现在句首，表明主语(动作的发出者)做了什么，就是open modifier
15.Warning that computers in the United States are not secure, the National Academy of Sciences has urged the nation to revamp computer security procedures, institute new emergency response teams, and create a special nongovernment organization to take charge of computer security planning.
25.Using accounts of various ancient writers,scholars have painted a sketchy picture of the activities of an all-female cult that, perhaps as early as the sixth century B.C., worshipped a goddess known in Latin as Bona Dea, "the good goddess".
28.Building on civilizations that preceded them in coastal Peru, the Mochicadeveloped their own elaborate society, based on the cultivation of such crops as corn and beans, the harvesting of fish and seafood, and the exploitation ofother wild and domestic resources.
36.Dressed as a man and using the name Robert Shurtleff, Deborah Sampson, the first woman to draw a soldier's pension, joined the Continental Army in 1782 at the age of 22, was injured three times, and was discharged in 1783 because she had become too ill to serve.
79. Defense attorneys have occasionally argued that their client's misconduct stemmed from a reaction to something ingested, but if criminal or delinquent behavior is attributed to an allergy to some food, the perpetrators are in effect told that they are not responsible for their action.
原句“in attributing criminal…”在but 引导的句子中，显然是open modifier “the perpetrators”不和逻辑