.—May I remind you that a Mr. Zhang is waiting downstairs, sir? —Oh, dear. I about it.A.

.
—May I remind you that a Mr. Zhang is waiting downstairs, sir?
—Oh, dear. I about it.
A. forget
B. forgot
C. have forgotten
D. had forgotten

A. forget(答案→)B. forgotC. have forgottenD. had forgotten解析：考查时态。“先生，一位姓张的先生在楼下等你。”“噢，天啊！我忘记了。”指对话之前的事情，应该用一般过去时，即刚才忘记了。故选B。

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