18．I don't think it is worthwhile to sacrificeyour health to make great achievements．

分析 我認(rèn)為犧牲你的健康去做出巨大的成就是不值得的．

解答 答案：sacrifice
根據(jù)句意以及首字母的提示可知，空缺處的意思是：犧牲；由于此處用在動(dòng)詞不定式符號(hào)to之后，在句中作主語(yǔ)，表達(dá)的是主動(dòng)意義，故用動(dòng)詞原形sacrifice．

點(diǎn)評(píng) 做類(lèi)似的題時(shí)，首先應(yīng)根據(jù)句意以及首字母的提示判斷出空缺處的意思；其次從語(yǔ)法分析的角度，確定出應(yīng)填單詞的形式；因此在平時(shí)的學(xué)習(xí)中，除了應(yīng)牢固記憶單詞的拼寫(xiě)之外，還要熟練掌握一些的語(yǔ)法知識(shí)．

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