用被动语态译成英语1.---这封信必须立即寄出吗?-----是的,应立即寄出.(不,不应立即寄出)[两个都要!]2.这次会议可在哪儿举行?3.这道题解起来很容易,

1 must this letter be sent out immediately?yse it must.2 where can this meeting be held?3 this problem has been solved very easily,hasn~t it、翻译的不好 多多见谅～