A. Probably not B. yes C. probably not.
Sue is giving orders (a lot depends on the tone of voice here). Jim wants to prove he doesn't take orders from Sue by deliberately using a different, more formal register ("How do you do", using his surname.) By doing that, he is being less friendly to Mary, so he is probably not very interested in meeting her.

A. No B. yes C. yes.
Here we have two people who know each other in a social setting who have suddenly met on official business. Bill is reminding Mike that this is official, and his formal title should be used. But he continues to call Mike by his first name to show that he wants to be friendly.

A. Yes B. probably not C. yes.
From this we cannot tell which of the two is of higher status. However, Victoria does not want to use informal terms with Colin, and her use of "Mr Williams" a second time tells him that very plainly indeed.

A. Yes B. yes C. yes.
Mrs Anderson and Joe Thompson have met before, and Mrs Anderson is ready to go immediately to an informal level. The use of Mr Thompson's surname indicates that they do not meet often, but get on very well. Mr Jones introduction of Mrs Anderson included her profession, indicating he did not know the two had met.

A. Yes B. no C. probably not.
Sally skips the introductions because she thinks her question is more important. Since there are so many ways to give an insulting greeting, enemies usually do this when they meet, so Sally is really concerned, and therefore a good friend. She is probably not Jenny's mother. Although some adult Englishwomen do call their mothers by their first name, it is not very common.

A. Probably not B. yes C. no.
Andrea is rude and aggressive. She does not return the greeting, and she does not use an honorific (e.g. "Mister"). In English to "have a word" means a discussion about something. "I want" means that she will talk whether Bill likes it or not. A politer form would be "can I have..."

A. Yes B. no C. yes.
"That Wendy Farrel?" suggests Mike knows about the person, but has never met her. "Gosh" shows he is impressed. So Mike is not being insulting. (Unless he is being sarcastic, and pretending to be impressed.)

A. Yes B. no C. yes.
Kate gives a casual greeting, Mike does not return it. This informality means they know each other well. If Mike had asked about the trip he would have said "How was it?". His question was whether the purpose of the trip was successful; so he knows where she went.

A. No B.no C. yes.
Becky gives her full name, and calls Philip "Mr". Philip's response of "Miss" shows that the meeting is not social. "There you are" shows he was waiting for Becky to find him, suggesting that he was expecting her, and he is of higher status.

A. No B. yes C. yes.
Janet is using a line from many old movies, when the hero meets the villain. So she uses a "ve" for "we", since the villains in many of these films were foriegners! So she is joking. She must know of Doug, since English people do not answer strangers like that. Probably they have the same friends, and have heard of each other.

A. Probably not B. no C. probably not.
John is using a "pick-up line", to start a conversation with a girl he has never seen before. Julie is not interested, since she suggests that John would have made a strong impression (negative) on her if they had met. Of course, if Julie's voice suggests she would have remembered him favourably, John still has a chance ...