这是我参加过的最难的考试。

This is ___by ___far the most difficult exam I've ever taken.

在我看过的所有电影中，这一部无疑是最刺激的。

Among all the movies I've watched, this one is ___by ___far the most exciting.

他是我们团队里个子最高的人。

He is ___by ___far the tallest person in our team.