Hi, I'm learning textual linguistics and I need some help to solve the following sentences for my exam tomorrow. Basically, this is what we have as an example task: In the following examples, comment on the underlined words and the cohesive tie they illustrate (co-reference, substitution, connectors and connectedness, ellipses and lexical cohesion) below each example. How are the underlined words used and how they contribute to cohesion? One-word answers are not expected!

No, I don’t need the month’s bestseller. And please, do not call next month either. – "and" is underlines
He wouldn’t order a gin, but he had a beer. – Particle “but” is underlined
They couldn’t do a thing like that to one . – One never knows, does one? It makes one think, though.- all the "one"'s are underlined
Pick these up! - "these"
Look at the flowers! - "the"
He is very clever, but he couldn’t prove the theorem. - "but"
There seems to have been a great deal of sheer carelessness. This is what I can’t understand. - "This"
Has Barbara left? – I think so. - "so"
If he said so, he’ll come. - "so"
They haven’t got my usual morning paper. Can I borrow yours? - "yours"
The first three buds fell off. We’ll have to watch the next. - "the first" and "the next"
Borrow my copy. The library one is out on loan. - "one"
Take these pills three times daily. And you’d better have some of these too. - "these", "some of these"