Final answer:
A broadcaster who hasn't seen the wire copy until he speaks it aloud is said to 'read and speak.' This practice involves reading the news script for the first time while on air.
Step-by-step explanation:
A broadcaster who hasn't seen the wire copy until he speaks it aloud is said to read and speak. This phrase refers to the practice of reading the news script for the first time while on air. It implies that the broadcaster is able to deliver the news smoothly and accurately without prior knowledge of the content.