Fortunately, the illness is fully treatable if within ten days.
A. being found
B. find
C. to be found
D. found
网友回答
A. being found
B. find
C. to be found
(答案→)D. found
解析：考查虚拟语气。句意：幸运的是，这种病如果能在十年内发现，是完全能够治愈的。从句中为虚拟语气，在表示将来的条件句中动词用过去形式。这种病是 被发现的被发现的对象，用被动语态，助动词were可以省略，选D。