问题标题：
Weweredelayedattheairport．Otherwise，weherebylunch．（）A.musthavebeenB.couldbeC.shouldbeD.wouldhavebeen
问题描述：
We were delayed at the airport．Otherwise，we here by lunch．（）
A.must have been
B.could be
C.should be
D.would have been
曹一家回答：
答案：D根据题干中的otherwise可知，此句是含蓄虚拟条件句，相当于if引导的虚拟条件从句．由谓语动词weredelayed可知是过去的一件事，所以主句的谓语动词形式应为would/could/might/shouldhavedone．原句可改为If...
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