There is no doubt international cooperation is the key to with cyber crime.A. whether; d

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A. whether; doing
(答案→)B. that; dealing
C. whether; do
D. that; deal
解析：考查同位语从句和动名词做宾语：句意：毫无疑问国际合作对付网络犯罪的关键。第一空填that引导定语从句，说明doubt的内容，第二空填dealing，the key to doing，…的关键，选B。