Образуйте от прилагательных Превосходную степень
1.a great invention
2.an interesting experiment
3.available building materials
4. an independent decision
5.an outstanding scientist
6. skilled engineers
7. a secure structure
8.a warm seasons

1.the greatest invention2.the most interesting experiment 3.the most available building materials4.the most independent decision5.the most outstanding scientist6.the most skilled engineers7.the most secure structure8.the warmest seasons