◎ 题干
The passengers’ (乘客) families were        to keep calm as soon as they heard the bad news.
A.too sad B.sad enough
C.enough sad D.so sad
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“The passengers’ (乘客) families were to keep calm as soon as they heard the bad news.A.too sadB.sad enoughC.enough sadD.so sad…”主要考查了你对  【状语从句】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。