There is no doubt _____ short sight is a serious problem among the youth of our country.
A.which B.whetherC.whatD.that
D

試題分析:考查同位語從句:句意:毫無疑問在我們國家年輕人目光短淺是一個很嚴重的問題。doubt是同位詞,that引導(dǎo)的是同位語從句,對doubt的內(nèi)容進行說明。要注意的是如果是There is doubt就應(yīng)該用whether連接同位語從句。選D。
點評: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。
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