Read the situations and choose the correct words. Situation 1: somebody has problems with passwords 1 I could / couldn't think of a new password yesterday 2 I can/ can't remember my password now. Situation 2: somebody gives advice about passwords 3 You must / mustn't use different passwords for all websites. 4 You must / mustn't choose your friends' names for passwords. 5 You have to / don't have to choose a password that is easy to remember. Situation 3: somebody doesn't have problems with passwords 6 I could/ couldn't remember my password yesterday 7 I can/ can't get on to all my favourite sites today.