2) —I’m sorry to have kept you waiting.
—______, Bill.
A. You’re welcome B. Go ahead C. Don’t mention it D. No problem
点拨：选D。对道歉的应答常见的有：That’s all right /That’s OK / That’s nothing / Never mind / It doesn’t matter / No problem等，意为“没关系”。而Don’t mention it是用来回答对方表示感谢时的用语。
