Exercise 1:Choose suitable words/ phrases to fill in the blanks. Some sentences may have MORE THAN ONE possible answers.
1. They came back home ____________ the volcano had been erupted.(after/ when/ until)
2. ____________ the tsunami waves traveled inland, people had moved to safe places. (by the time/ before/ after)
3. ____________ I got to Nick’s village, the flood had destroyed his house. (when/ while/ by the time)
4. ____________ we came back to our home village last month, it had changed so much. (as soon as/ when/ since)
5. He told me he hadn’t seen tornado ________.(after/ before/ by the time)