1. It was confident of him to present his ideas in front of the committee.
It + to be + adj (dùng chỉ người) + of sb + to do St : Ai đó thật ... khi làm gì...
2. It was surprising for us to get the scholarships.
It is + adj (thường dùng chỉ vật)+ (for sb) + to do St: Thật là.... cho ai đó....để làm gì
3. After having taken several steps to whiten the palm leaves, they sew together the leaves and the rings.
Hoặc: They sew together the leaves and the rings after having taken several steps to whiten the palm leaves.
4. Chicago is the third-largest city in the U.S.