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Q25，簡化題干為migration from east, impossible, due to,關(guān)鍵詞impossible，通過due to(因為)進一步預判答案信息為表示原因的句子，常由信號詞because, because of, since, the reason is等詞組引導。

答案句：they thought that travel from the east was impossible, because of the huge, empty stretch of the ocean that lies between the islands and the nearest inhabited land. 其中impossible與題干關(guān)鍵詞impossible對應，because of與題干due to對應，huge，empty stretch(巨大的延伸)與A選項far away對應，故答案為A。

干擾項分析：

B-缺材料，未提及。

C-風和洋流的方向，文中提到研究云的移動cloud movements，洋流ocean currents，去發(fā)現(xiàn)是否能夠從冬眠遷徙，不符合題干要求。

Q26，簡化題干為main reason，raft journey，同樣要重視原因類信息表達的句子。

答案句：I think it was more a matter of simply trying out his idea…yes，that’s probably。其中try out譯為試驗，考驗對應C選項test，idea對應theory，故答案為C。

干擾項分析：

A-克服研究挫折，未提及。