II. Underline and correct a mistake in each sentence below.
1.Will flying cars to help us solve the traffic jam problem? ______________
2. A amazing new train will speed along at 800 miles per hour. ______________
3 A jetpack doesn’t take off lots of space. ______________
4. The monowheel is a one-wheeled vehicle and the driver sits outside it. ______________ 5. I think self-driving cars won’t be available in around 2050. ______________
6. Although electronic cars don’t cause air pollution, they still cause traffic jams. ______________
7. We will see this kind of cars on the roads for 20 years. ______________
