---What did the policeman ask the neighbors about?
--- He asked ____ between 3:00 and 4:00 yesterday afternoon.
| A．they did what | B．what were they doing |
| C．what they were doing | D．what did they do |
---What did the policeman ask the neighbors about?
--- He asked ____ between 3:00 and 4:00 yesterday afternoon.
| A．they did what | B．what were they doing |
| C．what they were doing | D．what did they do |
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