3．While it may not be worthwhile for older patients，younger patients are more likely to regard anything that gives them a lifelong working knee joint as well worth the cost．

分析 雖然老年的病人也許認為不值得，年輕的病人更有可能認為任何給予他們終生有用的膝關(guān)節(jié)的東西完全值得這個代價．

解答 答案是worthwhile．本題考查語境中選用恰當?shù)脑~或短語；worth adj．值得，后面必須接賓語；worthy adj．值得的；必須用在結(jié)構(gòu)be worthy of （being done）/to be done中；worthwhile adj．值得做的；值得花時間/金錢/精力的；往往用 it做形式主語，構(gòu)成It is worthwhile  for sb．to do sth．/doing sth．做…是值得的；或sth．be worthwhile某事值得；由下文中的"well worth the cost完全值得這樣的代價"推斷老年病人認為不"值得花錢"，根據(jù)搭配判斷答案是worthwhile．

點評 首字母填空必須在對語境整體理解的基礎(chǔ)上抓住指向答案的關(guān)鍵線索、固定句型或搭配等，并聯(lián)系首字母，同時注意所選詞的形式變化．

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