...

Either one of the two.

"Either one of the two" in (2) was referring to the prepositions about/on, though it also applies to give/deliver.

Es wurde zwar nach der Präposition gefragt (wie # 2 richtig sagt "about"), aber als Verb geht auch noch einfach "to make". Muttersprachler: kann man wirklich "to hold a speech" sagen? Ich dachte immer, es geht nur "to make/give/deliver a speech".

@4:

http://david-crystal.blogspot.com/2009/01/on-...

"give a speech is the more general usage; but hold a speech can be used where the focus is explicitly on the event rather than on the subject-matter"

You could 'hold a speech' in the sense that you 'hold a meeting and give a speech there' (i.e. hold the meeting for the purposes of giving the speech)

Danke SP. Interessanter Link.

Und in der Hoffnung, nicht gegen das Copyright zu verstoßen:

Michael Swan Practical English Usage (Third Edition, Oxford University Press)

4 about and on

Compare:
- a book for children about Africa and its people
- a textbook on African history
- a conversation about money
- a lecture on economics

We use about to talk about ordinary, more general kinds of communication. On suggests that a book etc. is more serious, suitable for specialists.

@#7

I would agree, with the caveat that those differences are trends and not exclusionary. In many cases either preposition is appropriate.