It’s too cold .You had better your coat.A. don’t take offB. not take offC. don’t put onD.

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A. don’t take off
(答案→)B. not take off
C. don’t put on
D. not put on
解析：此题考查固定句型结构had better do sth表示最好做某事，其否定形式为had better not do sth。