[单选题]Which of the following sentences is the most courteous?
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2023-11-01 15:02:44
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[单选题]Which of the following sentences is the most courteous?

A.[""I've well received your letter yesterday."", 'No smoking.
B.The color is guaranteed not to dull for three years.
C.We will deliver your order as soon as payment is received.
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广东开放大学

形成性考核

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