--Spacecraft Discovery has failed in the course of launch.
-- ? They have been preparing for the test.
A. How e?
B. When
C. What for
D. Why not
网友回答
(答案→)A. How e?
B. When
C. What for
D. Why not
解析：考查交际用语。A怎么会？为什么会这样？C为了什么？D为什么不？句意：—发现号在发射过程中失败了。—怎么会？他们一直在准备测试。