Answers:
Present Subjunctive Third Person Singular (Spanish):
1) buscar: busque
2) dar: dé
3) escribir: escriba
4) estar: esté
5) estudiar: estudie
6) ir: vaya
7) oír: oiga
8) poder: pueda
9) saber: sepa
10) ser: sea
11) traer: traiga
12) vivir: viva
Explanation: I took Spanish. Hope this helps! :)
1-los estudiantes están haciendo su trabajo
2-Maria es bonita y alta
If it has a correct gender specific noun. If its singular or plural. Irregular verbs. The fact there is two different verbs. Past tense or current. Verb of change. Spanish prepositions. Direct and indirect pronouns. The word gustar.