如何区分托福阅读推理题并准确作答

　　推理题的标志是在题干中出现infer/imply/suggest/indicate/most likely 这样的词汇，它和细节题属于同源题目，都需要定位并且根据文中信息来选择答案。与细节题不同的是，推理题在找到原文中定位点之后考察的是学生对于文中信息的总结概括，或者反向推理的能力。我们来看一道例题，

　　It should be obvious that cetaceans-whales , porpoises, and dolphins-are mammals. They breathe through lungs, not through gills, and give birth to live young. Their streamlined bodies, the absence of hind legs, and the presence of a fluke3 and blowhole4 cannot disguise their affinities with land-dwelling mammals. However, unlike the cases of sea otters and pinnipeds (seals, sea lions, and walruses, whose limbs are functional both on land and at sea), it is not easy to envision what the first whales looked like. Extinct but, already fully marine cetaceans are known from the fossil record. How was the gap between a walking mammal and a swimming whale bridged? Missing until recently were fossils clearly intermediate, or transitional, between land mammals and cetaceans.

　　Which of the following can be inferred from paragraph 1 about early sea otters?

　　○ It is not difficult to imagine what they looked like

　　○ There were great numbers of them.

　　○ They lived in the sea only.

　　○ They did not leave many fossil remains.

　　首先我们来对题目的出题范围进行定位，题干的blowhole可以作为定位词汇，定位到原文的第四句话：“However, unlike the cases of sea otters and pinnipeds (seals, sea lions, and walruses, whose limbs are functional both on land and at sea), it is not easy to envision what the first whales looked like.” 在这句话里交代了“unlike the casess of sea otters”，即与sea otters 不一样的是，whales 的陈述是：it is not easy to envision what the first whales looked like. 即，不容易看出第一头鲸长什么样子。而sea ottter 是和鲸鱼相反，所以选择A选项，即不难看出第一头sea otter 长什么样子。所以实际上，这种题目虽然叫做推理题，但是并不需要同学们在做题的时候推的过远，基本考察的还是对原文信息概括和总结的能力。