英语翻译1-10句，用it用法翻译

1.It's impossible for them to grasp the techinue to use the computer overnight.
2.It's time to take measures to solve this problem.
3.It worries her that her hair is turning
grey.
4.It's no use trying to mend the machine.
5.It excites people to own this job.
6.It has been third time since they come here.
7.Is it possible of you to think they could send an engineer？
8.It's greetful of me for you to see me.
9.It has been ten years since they lived here.
10.What really matters is not who is right but what is right.
11.I hate people talking about me in the back.