These books_______out of the reading room.You have to read them here.A.must be taken B.can’t take C.can take D.mustn't be taken并分析考察的知识点

问题描述:

These books_______out of the reading room.You have to read them here.
A.must be taken B.can’t take C.can take D.mustn't be taken
并分析考察的知识点