Choose from the list the correct verb in the proper grammatical form, using each verb only once
speak,  search,  talk,  research,  do,  make,  hang

1. The farmers have been [ ] for several days now but have not come to a
   decision yet.
2. All this chain of unfortunate events [ ] to the need of deep changes in the
   work of the company.
3. The police detectives have been [ ] the territory of the crime for weeks but
   so far the evidence has been very controversial.
4. The scientists have been [ ] the strange phenomenon in the mountains
   despite a lot of skepticism from journalists.
5. This couturier has been [ ] his fashion business since the end of the 20th
   century and the designs are still in demand.
6. Our top manager has been [ ] a series of very insightful decisions that have
   helped us to bring our business off.
7. A stranger has been [ ] around the whole day and I have called the police
   to be on the safe side.