We____for Ruby because she never came.A.needn't wait B.shouldn't have waitedC.mustn't wait D.mustn't have waited答案应该选B,为什么?请说明原因,

We____for Ruby because she never came.A.needn't wait B.shouldn't have waitedC.mustn't wait D.mustn't have waited答案应该选B,为什么?请说明原因,
We____for Ruby because she never came.
A.needn't wait B.shouldn't have waited
C.mustn't wait D.mustn't have waited
答案应该选B,为什么?请说明原因,

We____for Ruby because she never came.A.needn't wait B.shouldn't have waitedC.mustn't wait D.mustn't have waited答案应该选B,为什么?请说明原因,
我们（当时/那时候）不应该等Ruby的,因为她从来都没有来过.
从意思上就可以选出来了

B
B表示不应该等的却等了
C表示不准等
D表示不准等却等了
A表示不需要等

后面never是过去完成时的标志，提示使用完成时态，而D选项语气太重
最佳答案为B

从后半句知道 Ruby 根本没来. 知道 "我们" 已经在等Ruby . A是不应该等 . C 是 不准等. D是本不能等而等了 . B是不该等Ruby 却等的意思 .
句意就是 我们本不该等Ruby(却等着Ruby), 因为她根本没来`