1.Who designed the CD_ROMs.(改为被动语态）

题目

1.Who designed the CD_ROMs.(改为被动语态）
——whom ______the cd-roms_____?

答案

Whom were the CD-ROMs designed by?楼上欠了个最重要的词：by做这类题的方法是,把需要作为被动语态的词按陈述句语序列在句首,再一一加入其他部分,就像上文的句子,先改为：The CD-ROMs were designed by whom?然后再...