【题目】There was a heated argument on the Internet as to _____ this kind of behaviour was against the law or not.
A. that B. whether
C. if D. when
在线课程【答案】B
【解析】
考查连词。句意：网络上，人们就这一行为是否犯法进行了激烈的讨论。分析句子可知，this kind of behaviour was against the law or not.作介词短语as to（关于）的宾语，作介词宾语，而从句的结构和意思完整，作介词宾语，不能if，只能用whether，故选B。