18.The only reason was that the theory he stuck toproved(prove) wrong.

分析 唯一的理由是他堅(jiān)持的理論證明是錯(cuò)的.

解答 proved 考查單詞填空.prove是連系動(dòng)詞,表示已發(fā)生的事情,用一般過(guò)去時(shí).注意:he stuck to是定語(yǔ)從句修飾先行詞the theory,如果不仔細(xì)分析,容易錯(cuò)看成to后接動(dòng)名詞形式proving.

點(diǎn)評(píng) 考查單詞填空,準(zhǔn)確地理解題意、然后根據(jù)題意及提示確定所填單詞詞形,正確寫(xiě)出單詞完成答題.

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