1.An overwhelming majority of people were convinced they would carry out their New Year resolutions.
be convinced 相信;确信
Some will never be convinced, of course.
当然,有的人永远不会被说服 。
2.All those who took part in the survey were of the opinion that 2018 would be significantly better than the year 2017.
be of the opinion that 认为
Many would be of the opinion that organic is indeed better.
许多人会认为,有机确实是更好的 。