7．When asked to explain         made her remain so young，she began to teil us her secret．（　�。�
A．what it was thatB．that what was it
C．it was what thatD．what was it that

分析 當被要求解釋到底是什么讓她保持這樣年輕時，她開始告訴我們她的秘訣．

解答 答案：A
題干中made her remain so young是作explain的賓語，是一個賓語從句；從句中made缺少主語，要用連接代詞；賓語從句中，從句要放的連詞后且要用陳述句語序；it was that構(gòu)成強調(diào)句型，對what進行強調(diào)，不影響句子結(jié)構(gòu)．故選A．

點評 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)它們在句中的語法作用，這類從句又可分為主語從句、同位語從句、表語從句和賓語從句． 本題中what在賓語從句中起連接作用，同時又充當了從句的主語．

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