________ecommerce worries some merchants,it contributes to the development of delivery industry.
A.When B.Unless
C.While D.Until
________ecommerce worries some merchants,it contributes to the development of delivery industry.
A.When B.Unless
C.While D.Until
C解析: 考查状语从句。句意为:尽管电子商务使一些商人担忧,但它促进了快递业的发展。根据句意可知,此处应用While尽管,虽然,引导让步状语从句。