1. All the food had been  prepared and the table had been laid as well.
-> not only.............
2. As soon as he was promoted, he started behaving arrograntly
-> No sooner............
3. He had no idea the the treasure had been hidden in the garden
-> Little..........
4. She danced so much the she couldn't walk afterwards
->So much
5. It was such a nice day the we went on an excursion
-> Such..........
6. The finished painting and then they moved into their new house
-> Only after.............
7. If I were you, I would accept his offer
-> were..........
8. If I had been told earlier, I would have reacted differently
-> Had...............
9. If I change my mind, I'll let you know
->...............
10. She didn't phone me, she didn't drop me a line either
-> She didn't phone me, ..............
11. She won't tell lies for any reason
-> On no...........
12. The boy ran away
-> Away...................
13. The hadn't told her the truth until she was 18
-> Not............
14. You will only pass the exam with flying colors if you study hard
-> Only when..............
-> Only by..................
15. I really admire her courage, but I still can't accept her selfishness
-> Much..................