托福阅读的总结题型要求考生在6个描述中选出3个能够概括原文主要观点，且与原文内容相符的选项。解题时，同学们一定要注意选项中的关系词，如因果、对比、转折、比较等。ETS往往会在关系词上设考点。

如 TPO20的第十四题中的E选项“Steamboats were originally used to transport passengers rather than freight”表明，passengers和freight是对比关系“rather than”。但是原文中最后一段的对应句“Steamboats eventually superseded all other craftin the carrying of passengers and freight”中passenger和freight之前是并列关系and。所以E选项的关系和原文不符，可以直接排除。