1. The future of our transportation is depended on___________. (invent)
2. Are there any___________ trains in the world today? (driver)
3. This button of the teleporter will make us ___________ from invisibility. (appear)
4. The ___________ of high-speed trains didn’t help much on noise reduction. (exist)
5. The airplane crash damaged the area ___________. (serious)
6. We consider___________ one of the biggest inventions of human being. (teleport)
7. His driving test result was ___________ than mine. (bad)
1.inventors
2.self-driving
3.disappear
4.existence
5.seriously
6. teleportation
7.worse
