单选题 Vacation request forms must be submitted at least two weeks prior and ______ by the department manager.

A、 treated
B、 entitled
C、 journeyed
D、 signed

【正确答案】 D

【答案解析】[解析] 词汇：动词
1．这是一道词汇题，选项均为动词。
2．原文意思是“得到部门经理的签字后”，D．signed为正确选项。
3．...and (vacation request forms must be) signed by the department manager中，主语和must be被省略。