.. Department of Homeland Security and CIA produced ______ joint report on Monday warning that ______ next 911 could in fact occur on ______ different date.

A．the; a; the

B．a; the; a

C．/; the; the

D．a; /; the

科目 英语   题型 单选题   难度 中等

知识点： 冠词的用法辨析