把We must sell allthese goods.they must have lost your letter in the post.改为被动语态.
问题描述：
把We must sell allthese goods.they must have lost your letter in the post.改为被动语态.
答
All these goods must be sold by us.
Your letter must have been lost in the post by them.
答
All these goods must be sold.
答
All these goods must be selled by us
Your letter must have been lost by them in the post
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