5．There is apossibility （possible） of rain tonight．

分析 今晚有可能下雨．

解答 答案：possibility
此處用在不定冠詞a之后，指的是：有…的可能（性）；故用單數(shù)名詞possiblity．

點(diǎn)評(píng) 做本題時(shí)，應(yīng)結(jié)合句意，并從語法分析的角度去判斷句中所填單詞的形式；另外，在平時(shí)的學(xué)習(xí)中，應(yīng)熟練掌握所學(xué)到的詞匯以及各類詞法，句法等語法知識(shí)．

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