Do you have any idea ___ is actually going on in the classroom?
A.thatB.whatC.a(chǎn)sD.which
B

試題分析:考查同位語從句。本題同位語從句what is is actually going on in the classroom用來解釋名詞idea的內(nèi)容。What在句中做主語。That引導(dǎo)同位語從句,在句中不充當(dāng)任何成分,只起連接作用。句意:你知道在教室里發(fā)生的事情嗎?故B正確。
點(diǎn)評:解答這類題目,關(guān)鍵在于分析清楚句子結(jié)構(gòu),知道引導(dǎo)詞的使用習(xí)慣。通過判斷引導(dǎo)詞在從句中所作的成分,來選擇正確的引導(dǎo)詞。連接同位語從句的從屬連詞主要有that, if, whether,和疑問詞(what how where when ...)。that引導(dǎo)表示陳述句的同位語從句,if和whether,whether...or not引導(dǎo)表示“是否”的一般疑問句的同位語從句。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,但what, whatever除了指疑問外,也可以指陳述。連接副詞主要有when, where, why, how, whenever, wherever, however等。
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