1. Learning Japanese is difficult => It's difficult to learn Japanese

2. Making friends is not easy. =>It's not easy to manke friends

3. seeing a detective movie is interesting .=> It's interesting to see a detective movie

4. Helping other people is necessary .=> It's necessary ti help other people

5. To write that letter is easy.=> It's easy to write that letter

6. To meet him at the time of the day is difficult=> It's difficult to meet him at the time of the day

7.To meet again after my honeymoon holiday is very pleasant => It's very pleasant to meet again after my honeymoon holiday

8. To do all of these exercises in an hour is impossible.=> It's impossible to do all of these exercises in an hour

9. To swim in the summer morning is exciting .=> It's exciting to swim in the summer morning