阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填人一个适当的词或使用括号中词语的正确形式填空。（请把【答案】填在答卷上）
What is red but green, open but closed and old but new? Answer: London’s new double-decker buses.
The traditional red double-deckers are    61   symbol of London. Their symbolic status was settled in 2008 when one bus made the longer-than-usual trip to Beijing    62   (collect) a very special passenger: the Olympic Flame.
Now a new bus design    63   (uncover) and it has been exciting Londoners.
The new bus uses more efficient green technology and has two staircases and an open platform,    64   (make) people able to hop on and hop off. It also has a unique design for the front end, which gives it an innovative（新颖的）look.
Despite(尽管）   65   innovations, the design is not all new. Its outward appearance takes after London’s faithful old double-decker, the Route master.
In July 2008 a    66   (compete) was launched by the London Mayor, Boris Johnson, to design a new Route master bus for the capital. There were over 700 entries,  67  several designers jointly winning the £25,000 (244,000 Yuan) prize.
The new double-deckers, ___68___ have three doors to speed up boarding, are expected to be in service in 2012.
Mr. Johnson said: “This iconic new part of our transport system is not only beautiful, but also has a green heart beating beneath its___69___ (attract) appearance.”
He expects cities around the globe to be “beside themselves with envy” for ___70__ he described as a "stunning red symbol" of 21st-century London.