Adjectives with to-infinitive and that clause
We were lucky. We passed all of the exams last month. → We ...
We were lucky to pass all of the exams last month.
He will win the game. I'm sure. → I'm ...
I'm sure (that) he will win the game.
Susan received a lot of presents for her birthday. She was very happy. → Susan ...
Susan was very happy to receive a lot of presents for her birthdays.