Hi !!
1- En Costa Rica se habla español.
<em>In Costa Rica spanish is spoken.</em>
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2- En las librerías se venden libros y revistas.
<em> In the bookshops, books and magazine are sold</em>
<em>-</em>
3-En los restaurantes se come comida.
<em>Food is eaten in the restaurants</em>
<em>-</em>
4- En los consultorios se prescriben <em>(dan)</em> medicinas.
<em> In the doctor's office medicines are prescribed (given)</em>
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5- En el campo se duerme muy bien.
<em> At the country side we/you can sleep very well.</em>
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6- En el mar se puede nadar y pescar.
<em>In the sea we/you can swim and fish.</em>
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EXPLANATION
"se" fulfills the same function as the passive voice in English. <em>(but isn't grammatically a passive voice)</em>
"Se" in an impersonal way can be translated by "one" or "you" (like the French "on") when talking about people in general.
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<em>no verbs were given, so I tried to choose the most appropriate ones</em>
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hope this helps<em>☺☺☺</em>