There is no doubt ______ international cooperation is key to ______ with cybercrime, as Vinton Cerf has said that the problem of cybercrime is _______ huge that it requires UN to form a special agency to act as an international referee or steward
A.whether ; doing ; soB.that ; dealing ; soC.whether ; dealing ; suchD.that ; doing ; such在线课程B
解析：
There is no doubt that毫无疑问，key to doing做某事的关键，so … that …如此……以致……，故选B。