1) is being replaced by the computer and the projector
（考点：被动语态的现在进行时）
2) will have been published by the end of this year
（考点：被动语态的将来完成时）
3) can be used to demonstrate the way that cells work
（考点：1. 被动语态与情态动词联用; 2. 汉语有些没有“被”字等标志词的句子也表示被动, 要译成英语的被动语态）
4) I was startled, for the prices were a great deal higher than I had anticipated
（考点：同“3”的考点2）
5) Effective measures must be taken immediately
（考点：汉语的无主句通常翻译成英语的被动语态）