these new books must ______ before the teacher comes to the classroomA be given out B gave out C are given away D give out +

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these new books must ______ before the teacher comes to the classroomA be given out B gave out C are given away D give out +

these new books must ______ before the teacher comes to the classroomA be given out B gave out C are given away D give out +
these new books must ______ before the teacher comes to the classroom
A be given out
B gave out
C are given away
D give out +

these new books must ______ before the teacher comes to the classroomA be given out B gave out C are given away D give out +
A be given out
must 是情态动词,后面要加动词的原型.所以BC都不对,另外,注意书是被分发的,book 跟give out 是动宾关系,用被动语态,所以选A

A, 因为books是物体,需要用被动语句, “需要被交出”
B 和D gave/give out 是主动语句
C 的be 动词不对,must 后要接be

选A
解析:give out分发;give away赠送,根据句意这些新书要被分发,所以用被动语态be given out