Exercise 71.1: Ago or before

Fill in the blank with ago or before.

Example: It's six o'clock. The shop closed half an hour ____.
Answer: It's six o'clock. The shop closed half an hour ago.

1. I have seen that man ____.

2. Maria left ten minutes ____.

3. People didn't have electricity 200 years ____.

4. We have been here ____.

5. I just saw her 2 minutes ____.

Unit 71