试题与答案

---Spacecraft “Discovery” has failed in

题型:选择题

题目:

---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

答案:

选A。

how come在这里的意思是“怎么回事?”,表示不解,惊讶。

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