Spanish language Q&A Forum

Why is incorrect to say, "Fueron vacaciones geniales"? According to the quiz, one must say, "Fueron unas vacaciones geniales"

Hola,

I don't understand how 'debido a que' is a wrong answer in the test for this question?

Ella dejó a su marido ________ su mal humor y sus celos.She left her husband because of his bad temper and jealousy.

I guess it's because it's a combination of nouns (humor, celos) without any further embellishment, but it's confused me because of the explanation referring to a noun, rather than nouns plural:

"If we use debido a que, it can never be followed just by a noun, it needs a phrase."

Gracias,

Mi abuela espera que ________ con ella este domingo. My grandmother hopes that I'll have lunch with her this Sunday.The answer is coma. But “have lunch” is almuerce.