Here are the corrections for each sentence:

1. Travelling by a bullet train will take you very little time.
   - The correction is in part C: "time" should be plural, "times."

2. A self-driving car is a mean of transport that can give people more free time and
   - The correction is in part B: "mean" should be "means."

3. "The telephone is ringing."-"OK, I am getting it now."
   - No correction needed.

4. Binh, a friend of me is very interested in eco-friendly vehicles.
   - The correction is in part B: "of me" should be "of mine."

5. We hope that there won't have any traffic jams in the future.
   - The correction is in part A: "won't have" should be "won't be."