15．Deep in the Atlantic Ocean，explorers have found ____may be the most valuable sunken treasure in history．（　�。�
A．whereB．whatC．thatD．which

分析 在大西洋的深處，探險(xiǎn)者們已經(jīng)發(fā)現(xiàn)了或許是歷史上最有價(jià)值的沉沒(méi)的寶藏．

解答 答案：B
題干中may be the most valuable sunken treasure in history是作found的賓語(yǔ)，是一個(gè)賓語(yǔ)從句；從句缺少主語(yǔ)，要用連接代詞what；which表示有范圍的選擇，句意表達(dá)的是特定的寶藏．故選B．

點(diǎn)評(píng) 從屬連詞是連詞的一種，用來(lái)引導(dǎo)名詞性從句和狀語(yǔ)從句．大致可分為三大類：that（無(wú)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(yǔ)、表語(yǔ)、賓語(yǔ)）；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(yǔ)）．學(xué)習(xí)時(shí)，要注意區(qū)分和掌握．

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