The scientist corresponds with colleagues in order to learn about matters ________ to her own research.
Mary and I have been close friends ______ we met each other 10 years ago.
After years of war, the people in that country were eager to live in_________.
Hearing the______ news, we all felt_______.
It is demanded that the plan _____ out as soon as possible.
Generally speaking, employers should not _____ themselves in the private matters of their staff.