Could you tell me ______ a moment ago?
| A．what were they talking about |
| B．what are they talking about |
| C．what they were talking about |
| D．what they are talking about |
Could you tell me ______ a moment ago?
| A．what were they talking about |
| B．what are they talking about |
| C．what they were talking about |
| D．what they are talking about |
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