17．How long do you think         China fulfils its drean of becoming a low carbon  leader in the world？（　�。�
A．it will be beforeB．will it be until
C．will it be whenD．it will be that

分析 你認(rèn)為多久以后中國(guó)會(huì)實(shí)現(xiàn)成為世界低碳國(guó)家領(lǐng)頭羊的夢(mèng)想？

解答 答案：A 題干中think后接賓語從句，從句要用陳述句語序，排除BC；句意表達(dá)是多久以后才，it will be+時(shí)間段+before從句，不是不久就，多久以后才．故選A．

點(diǎn)評(píng) 從屬連詞是連詞的一種，用來引導(dǎo)名詞性從句和狀語從句．大致可分為三大類：that（無詞義，不做成分）if，whether （表達(dá)是否的意義，但不做句子成分）； 連接代詞：who，whom，whose，what，which，whatever，whoever，whichever（有詞義，在句子中可作主語、表語、賓語）；連接副詞：when，where，why，how，how many，how long，how far，however，whenever，wherever （有詞義，作從句的狀語）．學(xué)習(xí)時(shí)，要注意區(qū)分和掌握．

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