Question

Are you coming home for dinner? I don't think so. I ... probably be late tonight.

 will
 am going to
 am​

Answer 1

Are you coming home for dinner? I don't think so. I will probably be late tonight.

O "will" é a única palavra que encaixa naquela frase.

"I am going to" também estaria certo, mas mudaria a estrutura da frase, ficaria assim:

I'm probably going to be late tonight.

I am probably going to be late tonight.

Answer 2

Resposta:

Explicação:

Are you coming home for dinner? I don't think so. I am probably be late tonight.