You have the option to apply for a US visa like the tourist visa with which you can enter US. The visa is issued and depending on purpose of trip the period of stay in US can be decided. Using the Form I-539 you can extend the period with a valid reason.
Does not matter if you are a US Green Card holder or not, when you have an Australian visitor visa, you can go there.
Yes,
yes they can do that
Does a Bangladesh Passport holder having USA Green Card need tourist visa for Cambodia
you can. However it will take 5-6 years to obtain, so you need to update the pending application once you get citizenship.
you will need a passport
I got married with my husband in December last year. He is planning to apply bankruptcy in Jan. Does bankruptcy effect my green card application? (by the way he got his green card in 2010)
No, there is ABSOLUTELY NO BENEFIT IN MARRYING A GREEN CARD HOLDER. Since she isn't a citizen, she CANNOT adjust the her husband's status.
That depends on the motives of the green card holder ;)
I had a student visa but went out of status Can i marry a green card holder and apply for a green card?"
A green card holder can receive loans. Those with a green card are able to apply for mortgages, and student loans for example.
you just ask the green card holder if you can borrow his.