If by any chance someone comes to see me, ask them to leave a __

If by any chance someone comes to see me, ask them to leave a ____.
A、message
B、letter
C、sentence
D、notice
【正确答案】：A
【题目解析】：leave a message 留个口信，留言； leave a letter 留封信；leave a sentence 留下一句话；leave a notice 留下一个通知；句意：万一有人来看我，请他们留言。因此A符合题意。