The opening of a speech uses a to get the audience's attention.

The opening of a speech uses a  "Hook" to get the audiences attention. A hook allows a small attention allowance at the beginning of a speech. They are used to grab the audience's attention.

in june, we will have been married for eighteen months. (i am assuming this is what you want? the sentence, as you have presented it, is grammatically incorrect--   you want it corrected, yes? )