______ riding shared bikes(共享单车) is an environmentally friendly way to travel,many of the bikes are thrown everywhere.( )
A.AlthoughB.AsC.UnlessD.Until
______ riding shared bikes(共享单车) is an environmentally friendly way to travel,many of the bikes are thrown everywhere.( )
A.AlthoughB.AsC.UnlessD.Until
试题篮
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