单选题 . Questions refer to the following passage.

9. What will happen if flextime hours are not used by the end of the year?______

【正确答案】 D

【答案解析】 选项A错误，文中没有这样说。选项B错误，时长不会累积到第二年。选项C错误，to be laid off意思是“被解雇”，这显然不是后果。选项D正确，forfeit意思是“失去”。