Complete the sentence with the correct form of the word

1. They need to
   [ ]
   the personal records and replace all the paper document with a complete database.
2. In the end, the boss refused to
   [ ]
   the eco-project that the team had been working hard on.
3. Last year our training course
   [ ]
   more than 2 hundred students to be admitted to college.
4. The director aimed to
   [ ]
   access to the new technologies they had developed.
5. They wondered how their safety could be
   [ ]
   .
6. He was working hard trying to
   [ ]
   a new sample of remedy.