The words if you don’t go over them for several days.
A. will forget
B. forgotten
C. will be forgotten
D. were forgotten
网友回答
A. will forget
B. forgotten
(答案→)C. will be forgotten
D. were forgotten
解析：句意：如果你几天不复习单词，它们就会被忘记。If引导的条件状语从句，主句用一般将来时，从句用一般现在时，且“单词”和“忘记”之间是被动关系，故用被动语态，选C。