3. which explorer discovered the dominican republic? christopher columbus vasco nuñez de balboa hernando…

Brief Explanations:

For question 3, Christopher Columbus reached the area of the Dominican Republic on his first voyage in 1492. For question 4, in Spanish, in expressions of emotion like "Es una lástima que...", the verb in the sub - clause takes the subjunctive form. Here "estar" is the infinitive verb in the sub - clause and "puedas" is the subjunctive form of "poder" (can) in the main clause, "lástima" is a noun (pity) and "es" is the third - person singular of "ser" (to be). The subjunctive verb in the sub - clause is "estar".

Answer:

3. Christopher Columbus
4. estar