Please make sure that no details before you deliver a speech.
A. would be overlooked
B. will overlook
C. are overlooked
D. are overlooking
网友回答
A. would be overlooked
B. will overlook
(答案→)C. are overlooked
D. are overlooking
解析：考查时态语态：句意：请确保在演讲前没有细节被忽略。Before引导的时间状语从句，用一般现在时，代替的是一般将来时，而且details和overlook是被动关系，选C。