In this question we are going to indicate which of the main clauses indicates that the second subordinate will have to be in the subjunctive.
1.) Es bueno que...
The subjunctive mood is the one that presents the fact, the action, but in an uncertain, imprecise, doubtful or eventual way. This is the verb mood required in clauses that depend on other verbs.
Learning Spanish takes practice, and that's great practice.
Aprender español requiere práctica, y eso es una gran práctica.
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