1)What time do we __ ( should/have to)be at the railway

1)What time do we __ ( should/have to)be at the railway station? 2)I __( may not/ can39;t) with this film . It39;s too boring . 3)We39;ve got a dishwasher , so you __ ( couldn39;t / needn39;t ) wash up 4)You look very pale, I think you __ (need/should) stay at home. 5) __(Could/might) you, please , pass me the salt. 6)He__(can39;t /couldn39;t ) open the window at it was stuck