С. 24 . use the prompts to give the correct advice, using either should or shouldn't. a: i'm very worried about my best friend. b: (worry so much) a: i've got a bad headache. b: (take/painkiller) a: i've broken my sister's new mobile phone b: (tell/tonight) a: it's very cold today. b: (wear/ a jacket) a: i feel very tired. b: (stay up/late)