IV. Circle the letter A, B, C, or D to indicate the correct answer to each of the following questions. (2.0 pts) 1. There will be less _________ if more people cycle. A. soil pollution B. air pollution C. deforestation D. noise pollution 2. If students recycle and use recycled materials, they will save _______. A. food B. water C. soil D. energy 3. Robots will help me do the housework, such as ______ the floor, cooking meals, washing clothes. A. doing B. making C. cleaning D. surfing 4. If you turn ________ the lights when you don’t use them, you will save electricity. A. off B. up C. down D. on 5. In 2030, robots will be able to talk to us, _______ they won’t be able to drive a car. A. so B. but C. or D. although 6. Nam __________ write a letter to an English friend when he was in Year 6. A. can’t B. could C. might D. shouldn’t