What's your expectative salary?
What do you expect to earn?
What salary do you expect?
How much money do you need to make to be happy?
What kind of salary are you looking for?
----I expect it could be 1200RMB a month.
I expect I can earn 1200RMB a month
你也可以用下面的回答
--Shall we discuss my responsibilities with your company first?I think salary is closely related to there ponsibilities of the job.