题目内容

They __________ two free tickets to Canada, otherwise they’d never have been able to afford to go.
A．had gotB．got
C．have gotD．get
B

B。句子前半句讲的是过去的事实，用一般过去时; 后半句讲的是对过去情况的假设，故用了would never have been这样的形式
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