—Spacecraft "Discovery" has failed in the course of launch.—_____? They have been preparin

题目简介

—Spacecraft "Discovery" has failed in the course of launch.—_____? They have been preparin

题目详情

—Spacecraft "Discovery" has failed in the course of launch.
—_____? They have been preparing for the test.
[     ]
A. How come  
B. When
C. How  
D. Why not
题型:单选题难度:偏易来源:月考题

答案

A

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