They _______ in Shenzhen at that time(在那时). They were in Shanghai. ( )
A:weren't
B:aren't
C:wasn't
互联网+传统集市=淘宝,互联网+传统银行=支付宝、余额宝,互联网+传统交通=嘀嘀打车、快的打车。互联网和传统行业结合的价值在于( )