将下一句子改为被动语态(九年级英语),能改几句就改几句,高手来
1.Whoboughtthebook?
2.Wesawhimsittingtherewithoutdoinganything
3.IwillringTomup
4.Someonehastakenthestrangertoanotherhospital
5.Didhedohishomeworklastnight?
6.Thestudentslistenedtotheteachercarefully
7.HeaskedtoplaythepianolastSunday
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