giải thích giúp em nữa nha 1. Shut the window , otherwise it’ll get too cold in here. If_________________________________________________________________ 2. Be careful . Otherwise , you’ll break the TV. If_________________________________________________________________ 3. Opening all the windows is the best way to get some fresh air. If_________________________________________________________________ 4. Listening to the teachers carefully is the best way to understand the lessons. If _________________________________________________________ 5. If you don’t work hard ,you will fail the exam. Unless ______________________________________________________________ 6. If you aren’t careful , you’ll break the vase. Unless___________________________________________________________ 7. If he doesn’t hurry , he’ll miss the bus. Unless___________________________________________________________ 8. Unless she gets up early, she will be late for school. Unless___________________________________________________________