7. We spent two hours getting to London.
→ It took .....us t two hours to get to London.
8. I'd rather drink coffee than tea.
→I prefer ........drinking coffee than tea.
9. The explanation was so complicated that I couldn't understand it.
→The explanation was too ......complicated for me to understand
10. Although he was tired, he was determined to finish his work.
→ In spite of his tiredness ,  he was determined to finish his work.