1. This is the first time Jane has ever visited Vietnam. à Jane has ..................................................................................... 2. This is the first time Tom has ever eaten this food. à Tom has ............................................................................................... 3. They have never been here before. => It is the first time................................................................................ 4.We haven’t met this man before. => This is the first time..................................................................... 5.I have never been to this place before.  This is the first time............................................................................................... 6. My father has never visited Ho Chi Minh City before . => It is the first time............................................................................................................. EX3:If Unless 1.If we don’t keep the environment clean, we won’t live a happier life. ->Unless we keep ........................................................................................... 2. If you don’t take care of those shoes, they won’t last for long => Unless......................................................................................................................... 3.If my brother did not work hard, he wouldn’t pass the exam. 4. Stop talking or you won’t understand the lesson.  If............................................................................................................................ 5. Work hard or your parents will be unhappy.  If you………………………………………..................................................... 6. If you don’t take care of those shoes, they won’t last for long =>Unless........................................................................................................ 7.They will be late for school if they don’t hurry. =>Unless they............................................................................... 8. If he doesn’t work harder, he’ll lose his job.  Unless………………………………………………………… 9.Unless it rains heavily, they will go for a picnic => If...........................................................................