4 Can I let you know my final decision on Monday?

Hiring managers have been known to put the squeeze on, especially if they really want you, but don't rush into decisions. Request at least several days to think through the decision. You can add, "I'm very interested in your company, but this will give me some time to make a more informed decision."
人事經理如果真想雇傭你的話，他們尤其會拿捏得很好，這時你就不要匆忙做出決定。給自己幾天的時間重新考慮一下自己的決定。你可以這么說：

I'm very interested in your company, but this will give me some time to make a more informed decision.

來源:可可英語 http://www.ccdyzl.cn/kouyu/200912/91692.shtml