题目内容：

Mary is ill today.If she _____,she _____ absent from school.
A.were not ill,wouldn't be
B.had been ill,wouldn't have been
C.had been ill,should have been
D.hadn't been ill,could be

优质解答

正确答案选A
if引导的虚拟语气
Mary今天生病了.要是她没有生病,她不会缺席上课的
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