His landlady gave him a week's to leave the flat.A. threatB. noticeC. adviceD. caution

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A. threat
(答案→)B. notice
C. advice
D. caution
解析：　　　本题译文：他的女房东通知他一周后从套间搬走。notice预先通知（尤用雇主、雇员或房东、房客之间）：give one's employee a month's notice (通知雇员一个月后离职)。