题目内容
4.A ship in harbor is safe,but that's not__________ships are built for.( )A. | what | B. | whom | C. | why | D. | when |
分析 句意:船泊港口固然安全,但这并非是造船的初衷.
解答 答案:A."____ships are built for"是从句,跟在is not 后作表语,表语从句中for后缺宾语,须要连接代词,而why和when是连接副词,所以排除C、D.what与for连用,表示目的,符合句意,故选A.
点评 本题考查名词性从句.系动词(含be动词)之后的从句是表语从句,从属于名词性从句.在名词性从句中如果缺少主语、宾语、表语,须用连接代词;如缺少状语或不缺成分,则用连接副词.再结合句意,即可得出答案.
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