The real threat of fraud(欺诈) on the Internet has highlighted the fact consumers fear shopping on line.
A. what
B. that
C. when
D. which
网友回答
A. what
(答案→)B. that
C. when
D. which
解析：考查同位语从句。同位语从句That consumers fear shopping on line.解释名词fact内容。句意：因特网真正的威胁已经突出这样的事实，很多消费者担心在网上购物了。