Questões de Concurso Público Prefeitura de Guabiruba - SC 2019 para Professor ACT - Língua Inglesa

Which of the sentences below express the correct use of “could”:
I- That could be Judith on the phone = to express present possibility II- I could hear a funny noise coming from somewhere in the engine = to express past ability III- It could snow! Look at the sky! = to express future possibility IV- you could try asking me before you use my comb, you know. = to give permission
Check the correct alternative:

Which alternative contains the correct use of the modal verb?
I- I don't know why I am so tired these days. I might be working too hard. Or maybe I am not sleeping too well. II- Do you know where Carl is? He should be out - his car keys are on the table. III- Go and look in the kitchen for your gloves. They can’t be in there. IV- Dan has been drinking that whiskey since early this afternoon. He must be totally drunk by now.
The correct alternative is: