Câu 3 :
3. Listen to the talk again and complete each sentence with ONE word.
(Nghe lại bài nói và hoàn thành mỗi câu với MỘT từ.)
1. Bullet trains will be faster, safer, and riders can avoid traffic _______.
2. SkyTrans will use less space and run on __________.
3. SkyTrans may be too _______for students.
4. ______will be cheaper and easier to use.
5. Solar-powered ships will be _______and comfortable.