Here are the correct answers to your questions:
Question 1: preparar
Correct answer: a - preparan (They prepare)
Question 2: mirar
Correct answer: c - mira (He/She/It looks)
Question 3: mostrar [o-ue]
Correct answer: d - muestra (He/She/It shows)
Question 4: confesar [e-ie]
Correct answer: a - confiesa (He/She/It confesses)
Question 5: entregar
Correct answer: d - entrega (He/She/It delivers)
Question 6: hacer
Correct answer: c - hace (He/She/It does/makes)
Question 7: dormir
Correct answer: b - duerme (He/She/It sleeps)
Question 8: entrar
Correct answer: a - entra (He/She/It enters)
Question 9: poner
Correct answer: a - pone (He/She/It puts)
Question 10: pedir
Correct answer: c - pide (He/She/It asks for)
Feel free to ask if you have more questions or need further assistance!