$\text{1. It is interesting to talk to Jill.}$
$\text{2. It is not easy to do this exercise.}$
$\text{3. It is difficult to see from here.}$
$\text{4. It is silly to lend him money.}$
$\text{5. It is not safe to drink this water.}$
$\text{6. It is dangerous to swim across this river.}$
$\text{7. It is difficult for him to understand.}$
$\text{8. It is very difficult to open the window.}$
$\text{9. It is not easy to translate the letter into English.}$
$\text{10. It is stupid to give up this job.}$
