Fill in the gaps with the correct word derived from the word in brackets

1. The injured patient responded well to [ ]. (Treat)
2. Eric had a(n)
   [ ] on his leg last year. (Operate)
3. I can't understand what this note says; it is completely
   [ ]. (Readable)
4. With the help of a robotic assisted device the surgeon was
   able to operate with more [ ]. (Precise)
5. It is important to follow all [ ]
   regulations in the science laboratory. (Safe)