1.The ocean can separate the two continents.

2.My nationality is Russian.

3.Russians are a peace-loving nation.

4.The sea doesn't separate England from France.

5.Curious means eager to learn about things that are new,interesting or strange.

1. A country border

2.Russians

3.Yes. Russians it's very peace loving nation

4.No, this is not sea. It's strait of the English Channel

5.When the person want know more than he know

Как-то так