We have to visit this exhibition. (make a question)

№ Choose the right word: Did you buy __________________ apples? № Even healthy people find it difficult to concentrate after hours of breathing less oxygen __________________ usual. № Choose the proper word: They decided to __________________ a post-office. № Choose the right form of the verb: “__________________ this machine remember instructions.”. № Выберите правильный ответ. These figures give only a very general impression of the nature and extent of state and federal programs and… № We live near each other. (make a negative sentence)