◎ 题干

-It was the headmaster, Tony. You______hello to him.
-Sorry. I didn't notice him.
A.must sayB.should say
C.must have saidD.should have said
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“-It was the headmaster, Tony. You______hello to him.-Sorry. I didn't notice him.A.must sayB.should sayC.must have saidD.should have said…”主要考查了你对  【虚拟语气】【情态动词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。