China began selling tickets for the Wuhan-Guangzhou high-speed railway, ______ boasts the world's fastest train journey with a 350km per hour average speed.
A.which | B.that | C.it | D.what |
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China began selling tickets for the Wuhan-Guangzhou high-speed railway, ______ boasts the world's fastest train journey with a 350km per hour average speed.
A.which | B.that | C.it | D.what |