Playing tennis is Li Na's favourite sport.(改为同义句） ______Li Na's favourite sport _____ ______ _______.
问题描述：
Playing tennis is Li Na's favourite sport.(改为同义句）
______Li Na's favourite sport _____ ______ _______.
答
What Li Na's favourite sport is playing tennis.
答
That Li Na's favourite sport is playing tennis.
答
Li Na's favourite sport 是名词词组,作主语时前面不需要加入任何引导词.因此可以考虑正确答案为：And Li Na's favourite sport is playing tennis.
答
That Li Na's favourite sport is playing tennis.