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
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
A
how come在这里的意思是“怎么回事？”，表示不解，惊讶。