1. Given (give) more attention, the tree could have grown better.
2. The computer center, opened (open) last year, is very popular among the students in this school.
3. The first textbooks written (write) for teaching English as a foreign language came out in the 16th century.
4. Lost (lose) in thought, he almost ran into the car in front of him.
5. Founded (found) in 1636, Harvard is one of the most famous universities in the United States.
