ГРАММАТИКА Прочитайте текст. Преобразуйте слова, данные в скобках, так, чтобы они грамматическисоответствовали содержанию текста. Заполните пропуски полученными словами. Каждыйпропуск соответствует отдельному заданию 13-18. Example: In a normal life a person sleeps (sleep)for about twenty-five years! 13 But why do we sleep? The simple answer is: “We ___________________ (not / know). We need more sleep when we are young. 14 A baby_______________ (need) about sixteen hours a day. 15 Five-year-old __________________ (child) sleep about ten hours. Teenagers sleep for eight and a half hours and adults – for seven or eight hours. 16 _______________ (old) people need only five or six hours. Some people sleep for only one or two hours a night. Poor sleep is very bad your health! 17 Once there was a man who said that he _____________ (have) no sleep for a month! The doctors believe that this is impossible. 18 Can you tell how many hours you _______________ (sleep) tonight?