问题
选择题
They got two free tickets to Canada, otherwise they______ able to afford to go.
A．wouldn’t have been
B．mustn’t have been
C．wouldn’t be
D．hadn’t been
答案
答案：A
句意：他们得到了两张去加拿大的免费票，否则他们是绝对出不起旅费的。否则；要不然，后面用would have done表示与过去事实相反的虚拟语气，本句相当于：If they hadn’t got two free tickets to Canada, they would, they wouldn’t have been to afford to go.