5 ***Write sentences with should/shouldn and must/mustn't and the words in brackets 1 It's very cold outside. (coat/catch) You should wear a coat or you'll catch a cold. 2 I'm sometimes tired in my Maths class. (get / more sleep) 3 I never remember what homework I have to do (concentrate) 4 I've got a really important exam tomorrow. (go bed/ late) 2 5 I usually get very hungry before lunch. (snack) 6 Olivia really wants me to help her. (call/ her late​