Răspuns:
1.We were very late,and the tour bus already left before we arrived.
2.How long did Sam work at the museum when they made him head of the Egypt Collection?
3.By the time we arrived at the museum,the archaeologist had finished her lecture.
4.Ivan was taking photos of the temple while Daniel was reading the museum's leaflet.
5. I didn't visit/haven't visited Greece until I went there on a school trip last summer.
6. The archaeologists were excited because they looked for the ancient ruins for years.