Can you check the grammar in the following sentences, please?

1) The most satisfying aspect of her work is that she doesn’t have to sit at a desk all day.
2) Though she has to write reports, she spends most of her time in court. 3) In particular, she has to question witnesses in the right way so that evidence comes out and the jury can reach a decision.
4) She finds it very satisfying when she gets the right verdict.
5) A woman is ringing from Calstra telephone services to inform a hypothetical client of their special rates on calls made to anywhere in Europe
6) She can guarantee that with Calstra he/she will make substantial savings on his/her phone bills.
7) She would like him to give them a call so that they can deal with any questions he might have and he can register with them.
8) Once he has registered, he just has to dial 1052 before any of his calls and he’ll be able to take advantage of the discounts.

5)Do you mean a woman is calling?