It is Tom often surfs the Internet playing games makes his parents very angry. A. 不填; th

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A. 不填; that
B. what; that
(答案→)C. that; that
D. that; what
解析：考查名词性从句及强调句。第一个 that引导主语从句，从句不缺少成分，第二个that引导强调句，强调主语that Tom often surfs the Internet playing games，故选C。