1. As the long lecture continued, the students´ interest began _____ .
waning
traversed
negotiate
dingy
2. It was so cold I could see my breath _____ along my brother´s back.
combustion
waft
3. The history of the internal _____ engine and early gas powered cars and inventors is fascinating.
4. The _____ sheets needed to be changed.
5. Ancient explorers _____ different parts of the world in search of gold and fame.
6. The team owners regularly _____ contracts with the players.
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