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15．I hear the concert will bebroadcast/broadcasted （broadcast） live on TV tomorrow evening．

分析我聽說明天晚上這場音樂會將在電視上直播．

解答答案：broadcast．首先分析句子結構，the concert 與動詞broadcast是被動關系，句子應該用被動語態，然后結合所給單詞的變化規則給出答案．broadcast的過去形式有兩種變化，一種是原形，另一種在后面加-ed．

點評本題考查動詞的語態和不規則動詞的過去時過去分詞的變化，這要求考生平時注意詞匯和語法知識的積累．

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B．The necessity of weather forecast．
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