18．It may not be        good university．But before        is found，we'll have to go there．（　�。�
A．/；a good oneB．a；a better oneC．/；the best oneD．a；a best one

分析 它可能不是一個(gè)好大學(xué)．但是在找到更好的之前，我們將不得不去那里．

解答 答案：B．a(chǎn)用于輔音音素開(kāi)頭的詞前；題干中的"一所好大學(xué)"，表泛指，"good university"中的good的讀音是輔音因素開(kāi)頭，應(yīng)用冠詞a；
is found是被發(fā)現(xiàn)；將還未發(fā)現(xiàn)的好大學(xué)與現(xiàn)有的大學(xué)進(jìn)行對(duì)比，應(yīng)該用形容詞比較級(jí)a better one，這里是兩者作比較根據(jù)語(yǔ)境判斷此處是與前面提到a good university相比較，所以應(yīng)該用比較級(jí)，泛指一個(gè)更好的大學(xué)．故選B．

點(diǎn)評(píng) 用a還是用an一般說(shuō)來(lái)，在輔音因素開(kāi)頭的詞前用a，而在元音音素開(kāi)頭的詞前用an； 然后再根據(jù)題干選出正確的選項(xiàng)．

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