16．请阅读下面短文，从每小题所给的 A、B、C 三个选项中，选出一个最佳选项，并在答题卡上将该项涂黑．
High-speed trains，Alipay（ 支付宝），shared bikes and online payment are seen as the new Four Great
Achievements of China by young foreigners，according to a video survey by the Silk Road Research Institute of Beijing Foreign Studies University．In the video，young people from 20 countries along Belt and Road Routes （ 一带一路） were asked to name great inventions that had influenced their lives in China．The following is what they said from 4 young people of them．
51．What does Justin think of the high-speed railways in China according to his words？A
A．Fast and tidy．
B．Convenient and wonderful．
C．Cheap and amazing．
52．What do"A"and"B"refer to （指） inYala's words？C
A．Two bikes．
B．Two riders．
C．Two places．
53．What does the underlined phrase"be in a tough spot"mean？A
A．Get into trouble．
B．Lose your way．
C．Stay in silence．
54．Which of the following is TRUE according to the above information？B
A．Bicycle-sharing system provides bikes for free．
B．There're no high-speed railways in Romania now．
C．Zhi Fu Bao is the only way of paying for things．
55．What conclusion（ 结论） can we draw about the new four great achievements？B
A．They were created by young foreign people．
B．They are the signs that China is improving rapidly．
C．They were brought to the countries along Belt and Road Routes．
