You ______ the examination again since you had already passe
You ______ the examination again since you had already passed it.
a.needn’t have taken b.didn’t need to take c.needn’t take d.mustn’t take
选什么?为什么答案是B,错了么 since引导的从句时,主语一般不是多为完成时么?这样的话,即使不是A但也是C对啊 ,不应该是B吧?
need是情态动词