Can these books （take）out of the libary?the classroom ____(clean)by us every day.
问题描述：
Can these books （take）out of the libary?the classroom ____(clean)by us every day.
答
be taken(被动语态） is cleaned（一般现在时的被动）
还原为陈述语序 These books can be taken out of the libary.所以上题的系动词为be.
两句话意思是：
这些书能被带出图书馆外吗?
我们每天都打扫教室.