Form of the verb 
1. After the war     (end), Vietnamese people focused on dealing with domestic matters.
2. As soon as I    (download) the document, I knew I     (make) a mistake.
3. Before the invention of Internet, most people     (read) newspapers to update current events.
4. By the time the firemen     (arrive), the fire     (destroy) three houses.
5. She   (not have) any experience in business communication, so we offered her a training course.
6. When I last     (speak) to her, she still     (not finish) her assignment.
7.     (you/ learn) about Vietnam war before you made the presentation about it?
8. She    (go) to Disneyland three times when she    (be) a little girl.