◎ 题干
— Spacecraft "Discovery" has failed in the course of launch.
— _____? They have been preparing for the test.   
[     ]
A. How come?     
B. When        
C. What for        
D. Why not
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“— Spacecraft "Discovery" has failed in the course of launch.— _____? They have been preparing for the test. [ ]A. How come?B. WhenC. What forD. Why not…”主要考查了你对  【日常用语、谚语】  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。