1. fill in: since, so or such.
1 he turned on the outside lights
it was dark outside.
2.it was a bright light that they could see the ocean floor.
3. the buildings were old that it looked like an ancient city.
4. they could reach land easily
they were close to europe.
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Answer

Объяснение:

1 He turned on the outside lights since it was dark outside.

2. It was such a bright light that they could see the ocean floor.

3. The buildings were so old that it looked like an ancient city.

4. They could reach land easily since they were close to Europe. - Они могли достичь земли легко, так как они были близко к Европе. Такой вариант тоже возможен

They could reach land easily so they were close to Europe. - Они могли легко достичь земли, а значит они были близки к Европе.