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7．Though he was ______ eight-year-old boy then，he had three big apples at ______ time．（　�。�
A．an； theB．an；/C．aD．an； a

分析 盡管那時(shí)他是一個(gè)8歲的男孩，但他可以一次吃掉3個(gè)大蘋果．

解答 答案：D 根據(jù)關(guān)鍵詞was可知這里強(qiáng)調(diào)一個(gè)男孩應(yīng)用a，由于緊挨著冠詞的eight的首字母是元音音素，所以冠詞a應(yīng)變成an； 結(jié)合語境應(yīng)是一次吃掉三個(gè)蘋果，強(qiáng)調(diào)一次應(yīng)該用冠詞a，為at a time．故選D．

點(diǎn)評(píng) 此題考查冠詞的用法．做題時(shí)抓住句中的關(guān)鍵詞并結(jié)合句意準(zhǔn)確判斷出應(yīng)用哪個(gè)冠詞．并要注意細(xì)節(jié)，尤其是冠詞后面緊挨的首字母是元音音素的情況．

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