---Spacecraft “Discovery” has failed in
题型:选择题
问题:
---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