4．_____is known to all is that watching TV properly may make our mind broad and our life rich．（　�。�
A．ItB．AsC．ThatD．What

分析 眾所周知的是，適當(dāng)?shù)乜措娨暱梢允刮覀兊乃季S開闊，生活豐富．

解答 答案是D．本題考查名詞性從句中引導(dǎo)詞的運(yùn)用．題干中第二個(gè)is 前為主語(yǔ)從句，從句中缺少主語(yǔ)；it 和as不引導(dǎo)名詞性從句，故排除A和B；that在名詞性從句中不擔(dān)任成分，不表達(dá)意思，故排除C；what在名詞性從句中做主語(yǔ)、賓語(yǔ)或定語(yǔ)；題干中缺少充當(dāng)主語(yǔ)的引導(dǎo)詞，故選D．

點(diǎn)評(píng) 名詞性從句考查的關(guān)鍵是連接詞的選用和語(yǔ)序，因此，我們首先要搞清從句的性質(zhì)，掌握各連接詞的用法，在此基礎(chǔ)上判斷．此外，關(guān)注名詞性從句用陳述語(yǔ)序．

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