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　　托福閱讀如何做修辭目的題呢？技巧二：巧用選項動詞排除大法

　　大部分修辭目的題的選項都是由to開始，以表示為了達到某個目的，而to后面的動詞比較容易被我們忽略，但其實仔細檢查這些動詞對于做題也是非常有幫助的。

　　例題二：

　　A third fossil formation containing both soft-bodied and hard-bodied animals provides evidence of the result of the Cambrian explosion. This fossil formation, called the Burgess Shale, is in Yoho National Park in the Canadian Rocky Mountains of British Columbia. Shortly after the Cambrian explosion, mud slides rapidly buried thousands of marine animals under conditions that favored fossilization. These fossil beds provide evidence of about 32 modern animal groups, plus about 20 other animal body forms that are so different from any modern animals that they cannot be assigned to any one of the modern groups. These unassignable animals include a large swimming predator called Anomalocaris and a soft-bodied animal called Wiwaxia, which ate detritus or algae. The Burgess Shale formation also has fossils of many extinct representatives of modern animal groups. For example, a well-known Burgess Shale animal called Sidneyia is a representative of a previously unknown group of arthropods (a category of animals that includes insects, spiders, mites, and crabs).

　　10. Why does the author mention “Anomalocaris” and “Wiwaxia”?（4）

　　○ To contrast predators with animals that eat plants such as algae

　　○ To question the effects of rapid mud slides on fossilization

　　○ To suggest that much is still unknown about animals found in the Burgess Shale

　　○ To provide examples of fossils that cannot be assigned to a modern animal group

　　這道題我們就可以先來看看選項動詞，a是contrast對比，b是question質疑，c是suggest表明，d是provide examples提供例子。

　　我們可以把這些動詞分為兩類，一類是中性的動詞，比如suggest和provide examples，另一類是負面的動詞，比如contrast和question。

　　因為作者在表達“負面”關系的時候往往會在文中用上but、however、while、whereas等連接詞，所以我們可以通過檢查定位句和前一句有無這樣的連接詞，來排除此類選項或者將范圍縮小到這類選項。

　　在本道例題中定位句和前一句就沒有這樣的連接詞，所以我們就可以先排除掉a和b。

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