1. We/ delighted/ get/ your letter/ yesterday.
→We were delighted to get your letter yesterday.
2.It/ not easy/ answer/ these questions.
→It's not easy to answer these questions
3.Your writing/ difficult/ read.
→Your writing is difficult to read
4. I/ surprised/ see/ Paul/ the party/ last night
→I was surprised to see Paul at the party last night
5.It/ impossible/ understand/ his theory.
→It is impossible to understand his theory
6.They/ ready/ start/ now.
→They are ready to start now
7. It/ cruel/ tease/ animal
→It is cruel to tease animal
8. you/ pleased/ see/ me/ again?
→Are you pleased to see me again?