题目：
There are signs ______ restaurants are becoming more popular with families. A．that B．which C．in which D．whose
答案
A
解析
本题考查同位语从句，所以选项A与题意相符。which引出的是定语从句或非限制性定语从句。that引导的同位语从句所说明的词常常是表示抽象概念的名词，如 fact，idea，opinion， news，proof，conclusion，thought，evidence等。当that引导的是同位语从句时，that是连词，本身无实在意义，that在从句中不作成分。