1 Any books can not be taken away.(按照应试教育的说法应该是这样,不过地道说法应该是none of the books can be taken away.)
2 Cheap things are often bought by my mom.
3 When was the room painted blue by Susan?
4 Some e-mails will be sent to her friends by her.
5 The garden has been watered by the worker.
6 The new leader is being given a warm welcome by all people in the factory.（多谢楼下兄弟,一下手快打错了.关于第一个,我学的时候老师说by you一般都是省略的...事实上跟外国人交流连被动语态都是很少用,所以这些语法的东西都不记得很清楚了）