19．________ she was at the time of the murder was of major concern to the police that are investigating the case．（　�。�
A．WhenB．WhyC．WhetherD．Where

分析 對(duì)調(diào)查案件的警察來(lái)說(shuō)，他們最關(guān)注的是謀殺案發(fā)生時(shí)，她在什么地方．

解答 答案：D   題干所給的句子中，前面的she was at the time of the murder 是主謂結(jié)構(gòu)；后面接了was of major concern to the police that are investigating the case系表結(jié)構(gòu)，說(shuō)明前面的部分是充當(dāng)了was的主語(yǔ)，是一個(gè)主語(yǔ)從句；警察查案關(guān)注的是時(shí)間和地點(diǎn)，而時(shí)間"案發(fā)時(shí)"句中已經(jīng)出現(xiàn)，地點(diǎn)where；why，whether無(wú)法和she was構(gòu)成有意義的句子．故選D．

點(diǎn)評(píng) 在句子中起名詞作用的各種從句統(tǒng)稱為名詞性從句．根據(jù)它們?cè)诰渲械恼Z(yǔ)法作用，這類從句又可分為主語(yǔ)從句、同位語(yǔ)從句、表語(yǔ)從句和賓語(yǔ)從句． 本題中where在主語(yǔ)從句中起連接作用，同時(shí)又充當(dāng)了從句的表語(yǔ)．

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