题目内容
20．There is _____"f"in the word forever．（ ）| A． | a | B． | an | C． | the | D． | / |
分析 在forever这个单词中有一个"f"．
解答 答案：B
a/an是不定冠词，表泛指，an用于元音音素开头的单词前，a用于以辅音音素开头的单词；the是定冠词，用于特指．字母f的音标是/ef/，第一个音素是元音音素，结合句意：在forever这个单词中有一个"f"，故选B．
点评 本题考查的是冠词的用法，要根据句子意思和冠词的用法规律做题，还要注意结合音标作答．
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