I m going to solve this mystery . m tired but before I turn out the light I m going to write down all the things I ll need for my investigation. Sally wants to be a detective and her hobby is solving mysteries. But this time the mystery is really difficult Read about Sally s adventures and enjoy Vocabulary areas People Personal feelings School and Study Travel Functions and Notions - Making predictions talking about im probability and im possibility Expressing opinions agreement and disagreement Expressing degrees of certainty and doubt Grammar and Structures - Present tenses simple continuous and perfect Past tenses simple continuous Future tenses going to will Adjectives Adverbs Modals Prepositions Question formation Verb patterns