Fill in the blanks using subordinate conjunctions.
1. He was ___ so drenched ___ that he was dripping all over.
2. ___ you want to attend the concert, I am trying for the passes.
3. Mr Gupta was sure of getting a reserved seat in the train___his son worked in the railways.
4. She knew ___ she was going to be in trouble.
5. ___ it's my birthday, I am treating everyone.