1. presume

Today we are going to learn “presume”. It means to think that something is true, although you are not certain.
(1) Each of you will make a speech, I presume?
(2) We must not presume too mush on the reliability of such sources.

2. auction

Another word is “auction”. It means a public meeting where land, buildings, paintings etc are sold to the person who offers the most money for them.
(1) This week 14 of his paintings were put up for auction.
(2) He came back with the book from the auction.