命名性失语
参考答案：
命名性失语：选择性命名障碍，多以描述物品功能代替说不出的词，语言理解及复述基本正常，病变累及优势半球颞中回后部或颞枕交界区。
They studied what ______ since 2007 and found Australian electricity prices were among the highest in the developed world.
A．has happened
B．happened
C．had happened
D．has been happening
证券交易所决定接纳或者开除正式会员以外的其他会员应当在履行有关手续10个工作日之前报中国证监会备案。( )
