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17．At lunch，the radioforecast （預報） that the mist would become a thick fog in the afternoon．

分析 午餐時分，收音機里氣象員報告說，薄霧到下午就會變成濃霧．

解答 答案是forecast．考查動詞forecast，表示"預告，預報"．句子缺少謂語，根據(jù)后文的would become可知用一般過去時態(tài)，所以用動詞forecast的過去式forecast作謂語．故答案是forecast．

點評 解答此類題目，首先需要明確考查的詞匯或者固定搭配，然后根據(jù)英語翻譯習慣和相關語法填寫正確的答案．

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