问题
选择题
It is _____ Tom often surfs the Internet playing games ______ makes his parents very angry.
A．不填; that
B．what; that
C．that; that
D．that; what
答案
答案：C
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。