1. The distance from my house to Ha Noi is over 20 kilometers. -> It's... 2. Be careful or you'll hurt yourself. ->If you are 3. There is a lot of traffic on the road, and Nam rides too fast =>Nam shouldn't...... 4. Our teacher is a careful driver.( DRIVES) => 5. Electric buses are eco-friendly. They will become popular in big cities soon. (SO)