可能说到转折关系词，大家第一印象往往是however、but，然后大家会下意识地认为转折之后是重点。其实这个想法非常危险也很容易掉入出题者的陷阱。下面我们来列举一个TPO的真题，来看看出题者到底是如何一步步带大家掉入陷阱的。Paragraph 6: Perhaps so much time has passed that there will never be satisfactory answers to the cave images, but their mystique only adds to their importance. Certainly a great art exists, and by its existence reveals that ancient human beings were not without intelligence, skill, and sensitivity.
According to paragraph 6, why might the puzzling questions about the paintings never be answered?
A. Keeping the paintings a mystery will increase their importance.
B. The artists hid their tools with great intelligence and skill.
C. Too many years have gone by since the images were painted.
D. Answering the questions is not very important to scholars.
再看一遍原文，我们不难发现一个因果关系词：so...that..表示“如此…以至于”，so...that中间的表示原因，所以答案是so much time has passed，和时间有关。正确答案是C。下面朗阁海外考试研究中心的专家帮助大家总结了托福阅读TPO中高频出现的转折关系词：but, however, in spite of, despite, although, though, instead of, nevertheless, nonetheless, yet, while, whereas.
我们再看一道真题：Paragraph1: The earliest discovered traces of art are beads and carvings, and then paintings, from sites dating back to the Upper Paleolithic period. We might expect that early artistic efforts would be crude, but the cave paintings of Spain and southern France show a marked degree of skill. So do the naturalistic paintings on slabs of stone excavated in southern Africa. Some of those slabs appear to have been painted as much as 28,000 years ago, which suggests that painting in Africa is as old as painting in Europe. But painting may be even older than that. The early Australians may have painted on the walls of rock shelters and cliff faces at least 30,000 years ago, and maybe as much as 60,000 years ago.
Paragraph 1 supports which of the following statements about painting in Europe?
A. It is much older than painting in Australia.
B. It is as much as 28,000 years old.
C. It is not as old as painting in southern Africa.
D. It is much more than 30,000 years old.
The structure of the backbone shows, however, that Ambulocetus swam like modern whales by moving the rear portion of its body up and down, even though a fluke was missing.
A. Even though Ambulocetus swam by moving its body up and down, it did not have a backbone.
B. The backbone of Ambulocetus , which allowed it to swim, provides evidence of its missing bone.
C. Although Ambulocetus had no fluke, its backbone structure shows that it swam like modern whales.
D. By moving the rear parts of their bodies up and down, modern whales swim in a different way from the way Ambulocetus swam.