1) Our plane is about to take off. You .......switch off your mobiles a) have to b) must c) shall d) should e) need to 2) You have been dating two girls for a month?? You....tell them! a) ought to b) have to c) might d) need to 3) I ......make a cake, but I am really exhausted after the conference:( a) may b) can c) could d) might 4) Yesterday I .....take care about my little sister. a) had to b) needed to c) must d) must to e) ought to

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