__________knowledge comes from practice is known to all.
A.IfB.WhatC.WhereD.That
D

試題分析:考查主語(yǔ)從句:分析句子可知is是謂語(yǔ),前面的句子是主語(yǔ)從句,因?yàn)橹髡Z(yǔ)從句是完整的句子,用that連接主語(yǔ)從句,而且不可以省略,句意:知識(shí)來(lái)自于實(shí)踐是眾所周知的。選D。
點(diǎn)評(píng):主語(yǔ)從句是在復(fù)合句中充當(dāng)主語(yǔ)的從句,通常放在主句謂語(yǔ)動(dòng)詞之前或由形式主語(yǔ)it代替,而本身放在句子末尾。解答這類(lèi)題目,關(guān)鍵在于分析清楚句子結(jié)構(gòu)。通過(guò)判斷引導(dǎo)詞在從句中所作的成分及意義,來(lái)選擇正確的引導(dǎo)詞。連接主語(yǔ)從句的從屬連詞主要有that, if, whether,和疑問(wèn)詞(what how where when ...)。that引導(dǎo)表示陳述句的主語(yǔ)從句,if和whether,whether...or not引導(dǎo)表示“是否”,引導(dǎo)一般疑問(wèn)句。連接代詞主要有who,whom, whose, what, whoever, whomever,whosever,whatever,whichever等。連接代詞一般指疑問(wèn),但what, whatever除了指疑問(wèn)外,也可以指陳述。
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