Come across, innumerable, commonplace, reappeared, anxious. Make sentences by using this words and phrases

1. Yesterday, I happened to come across my old diary while I was cleaning the attic. - come across means find by chance

2. Scientists say there are innumerable stars in the universe. - innumerable means countless

3. Religious wars were commonplace during the Dark Ages. - commonplace means ordinary

4. I thought I had everything fixed, when the problem reappeared. - reappear means to appear again

5. I was so anxious before my exam because I didn't study too much. - anxious means worried