Residents not to go out alone or to take part in any groups during the period of recent terrorist activities.
A. were always being warned
B. are always warning
C. always warned
D. had always been warned
网友回答
(答案→)A. were always being warned
B. are always warning
C. always warned
D. had always been warned
解析：在最近的恐怖活动期间，当地居民总是被警告晚上不能单独外出，并且不参加任何组织。 be always doing sth.总是做某事，表达某种抱怨﹑不满或赞许的情绪。人们“被警告”，要用被动态。