B. Periods of time in the past and present
B1. Punk music was popular in the last 1970s and early 80s.
B2. Our house was built in the mid-sixties.
B3. The hospital dates from the turn of the century (= the beginning of the century).
B4. Electric lights were invented near the end of the nineteenth century.
B5. Greek civilization was one of the most important in ancient times.
B6. Medical science has developed enormously in modern times.
B7. I love to hear Grandpa talk about the old days (= the time when he was young).
B8. In those days it was very difficult to travel across Africa.
B9. Everyone seems to be on the Internet nowadays/ these days.
B10. I’m really busy with work at the moment.