Your headmaster would have been happy to give you two days off, if you had gone and explained that your parents ill at the time.
A. were
B. had been
C. are
D. would be
网友回答
(答案→)A. were
B. had been
C. are
D. would be
解析：答案：A 考查时态。句意：如果你那时候去向校长讲清楚，你父母病了，他会乐意给你两天假的。本题中主句表示的是对过去的虚拟，虚拟条件句也表示对过去的虚拟，但虚拟条件句中的宾语从句表示的是过去的事实，故其谓语用一般过去时态。