1. Hyperloop is faster than SkyTran.

S  +be + ADJ + er + than + O :  ss hơn 

2. Are you interested in a driverless car?

Be interested in + Ving / N : thích 

3. Sua is talking to one of her friends.

one of  +N số nhiều: 1 trong những 

4. You should switch off electrical appliances when you are not using them.

should + V1: nên làm gì 

5. My brother's bike is red. Mine is green.

Mine: đại từ sở hữu 

6. If we don't buy the tickets soon, we can't watch this film.

If 1: If + HTĐ, TLĐ

7. It will be easy to drive flying cars.

It's + ADJ + to V 

= Ving .... + be + ADJ 

8. When I was in secondary school, I went to school on foot.

walk: đi bộ = on foot