---I’m afraid I must be off now .--- .A. No problemB. Never mindC. Step slowly D. See you

问题补充：

---I’m afraid I must be off now .

--- .

A. No problem

B. Never mind

C. Step slowly

D. See you soon.

答案：

A. No problem

B. Never mind

C. Step slowly

(答案→)D. See you soon.

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