---Could you tell me _____ a robot that can think like a human?

---It won’t be too long, I think.

A. when will we invent           B. when we will invent

C. when did we invent              D. when we invent

1、B

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---Could you tell me _____ a robot that can think like a human?

---It won’t be too long, I think.

A. when will we invent           B. when we will invent

C. when did we invent              D. when we invent

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