[originaltext]The grey-haired man is still a green hand at using computers, isn

The grey-haired man is still a green hand at using computers, isn’t he?
(A) Yes, he doesn’t have a lot of experience in using computers.
(B) No, he isn’t. He is skillful with computers.
(C) No, his hair is not green.

You have got some sales experience, haven’t you?
(A) OK, that would be fine.
(B) Yes, I used to be a salesperson in a department store.
(C) No, I didn’t know.