问题
选择题
Mary is ill today. If she _____, she ____ here at school
A．were not ill；would be
B．had been ill；wouldn't have been
C．were ill；should have been
D．hadn't been ill；could be
答案
答案：A
题目分析：句意：Mary今天生病了。如果她没生病，她现在就会在学校了。分析语境根据today可知表示
对现在情况的一个虚拟，所以从句用If 主语+过去时(Be动词用were)形式，主句用主语+should/would/could/
might+do形式。故选A。