题目内容
13．I am thirsty．I need ________ orange juice．（ ）| A． | an | B． | a | C． | / |
分析 我渴了，我需要一杯橙汁．
解答 答案：A
根据现有词语可知，句意为"我渴了，我需要一杯橙汁．"这里的"一杯橙汁"为泛指，所以此处应用不定冠词．不定冠词a用在辅音音素前，an用在元音音素前．orange的音标为/'?r?n（d）?/，是以元音音素开头的单词，故应该用不定冠词an，答案为A
点评 这道题要注意的是，表示泛指时要用不定冠词，且a用在辅音音素前，an用在元音音素前
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