B. VOCABULARY AND GRAMMAR I/ Mark the letter A, B, Cor D to indicate the underlined part that needs correction in each of the following questions. 1. He will be cleaning his house at 9 am tomorrow, didn’t he?. A B C D 2. My sister will be buying a house in the city center next year. A B C D 3. They will build a five-stars hotel on this street. A B C D 4. Everyday I go to work by foot, but she goes to work by bus. A B C D 5. I’m in a bus to Binh Dinh to join in a meeting there. A B C D 6. Will we traveling in driverless and high-speed cars in the future? A B C D