问题
选择题
They __________ two free tickets to Canada, otherwise they’d never have been able to afford to go.
A．had got
B．got
C．have got
D．get
答案
答案：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