It’s reported that over 70 different emoticons are used in text messages， happy：)is the most popular．
A. to which
B. that
C. of which
D. which
网友回答
A. to which
B. that
(答案→)C. of which
D. which
解析：考查定语从句：先行词是emoticons，定语从句红缺少of emoticons（在这些表情中），句意：据报道在短信中有70种表情，其中快乐是最受欢迎的。选C。