Complete the sentences with must be,can't be,could be,or might be. there may be more than one possible answer. ! 1. be careful with that dog.it might be dangerous. 2. it that difficult. even my little brother knows how to do it. 3. you really want to go bungee jumping? you mad. 4 a: where's gulmira? b: she in her room. i'm not sure 5. you hungry already. you've just had lunch