In the 21st century, China boasts the world’s longest high-speed railway network and has replaced all of the slow green trains with bullet trains.
A.正确
B.错误
正确答案：错误
In the 21st century, China boasts the world’s longest high-speed railway network and has replaced all of the slow green trains with bullet trains.
A.正确
B.错误
正确答案：错误