Are reasonable because jeans is plural. "is" is used when there is a singular subject and "are" is used when there is a plural subject.
The answer should be evidence
1. can be made up by a hearing person.
2. a physical or personality trait
3.agent marker
4. write (agent marker is just like an er on the end it means person doing something. so write would be the right answer.)
1. Si offendono/ inviti
2. Finiscono /smettono
3. Guardassimo/ si arrabbierebbe
4. Vedesse/ averta
5. Arrivasse/ è