17．People often have the belief _______ development is bad for the environment，_______does not have to be true．（　　）
A．which； itB．that； whichC．which； thatD．that； what

分析 人們相信發(fā)展對環(huán)境有害，這未必是正確的．

解答 答案是B．本題考查名詞性從句和非限制性定語從句中的引導(dǎo)詞的選擇．本題第一空后的從句說明的是名詞belief的內(nèi)容，是同位語從句；that在引導(dǎo)同位語從句時在句中不擔(dān)任成分，無意義；which引導(dǎo)名詞性從句在句中做主語、賓語，表示選擇"哪一個"；該從句從成分到意義都是完整的，故第一空選擇that，排除A和C；第二空是選擇引導(dǎo)非限制性定語從句的關(guān)系which，用which指代上文的一件事，what不引導(dǎo)定語從句，所以排除D，答案選擇B．

點(diǎn)評 名詞性從句考查的關(guān)鍵是連接詞的選用和語序：名詞性從句用陳述語序；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．本題還考查了引導(dǎo)定語從句的關(guān)系詞，關(guān)系詞是"代替"先行詞在從句中起作用的，what不引導(dǎo)定語從句．

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