Вставьте there’s или it’s. 1. don’t be upset about being late. … another advanced computer class today at four o’clock. 2. …not easy to cook dinner for the entire family. 3. …nice weather. i decided to forget my problems and just enjoy this beautiful spring day. 4. in many apartment and office buildings in the u. s. … no 13th floor. the 14th floor follows the 12th.