Fill in the blanks with Relative pronouns or Relative adverbs where necessary

Ex3. Fill in the blanks with Relative pronouns or Relative adverbs where necessary.
1. They showed me the hospital..............................buildings had been destroyed by
US bombings.
2. We saw many soldiers and tanks..............................were moving to the front.
3. Dr. Fleming, ............................... discovered penicillin, was awarded the Nobel
Prize for medicine in 1945.
4. He joined the political party..............................was in power.
5. Love, .............................. is a wonderful feeling, comes to everyone at some time
in his life.