Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each...

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 631 to 635.

In the future, transportation is likely to undergo significant changes. Firstly, we may see more electric vehicles on the roads, (631) _______ will help reduce air pollution and reliance on fossil fuels. These vehicles are powered by electricity instead of gasoline or diesel, making them more environmentally friendly. (632) ______ change could be advancements in autonomous vehicles, also known as self-driving cars. These vehicles can operate without human input (633) ______ they potentially make transportation safer and more efficient. Additionally, we might see the (634) _______ of high-speed trains and hyperloop systems, allowing people to travel faster between cities. Overall, future transportation (635) ________ the promise of being cleaner, safer, and more convenient for everyone.

(Adapted from www.plugandplaytechcenter.com)

Trả lời cho các câu 631, 632, 633, 634, 635 dưới đây:

Câu 631 :

A. which        B. that        C. what        D. who