complete the gaps using the present perfect or past simple form of the verbs in the brackets?, 1,things___(change)a great deal at our company. When we first___(start) working here three years ago, the company___(have, only) six employes. since then, we__(expand) to include more than 2000 full time workers.? only write answers​

- "the basic difference between keywords and subjects is that subjects (or "subject headings") have been predetermined, while keywords have not. a keyword is an easy place to start because you can use any word that seems to fit your search; this is called "natural language" searching."

yes you could be a life guard if that the question.