20．Thefirstpainting is so beauiful．I'd like to buy it．（one）

分析 第一幅油畫(huà)是那么漂亮，我想買(mǎi)了它．

解答 答案：first．
空格后面是名詞painting，結(jié)合給出的英語(yǔ)提示one，很顯然用one填空是不合適的，所以要用其序數(shù)詞形式first來(lái)填空，意思是"第一幅畫(huà)"綜上所述，故填first．

點(diǎn)評(píng) 首先要掌握句子的意思，還要掌握序數(shù)詞的用法，然后結(jié)合具體的題目，就可以確定正確答案．

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