—Did they clean the house yesterday？
—________，They cleaned at five o’clock．
| A．No，they didn’t |
| B．Yes，they did |
| C．No，they don’t |
| D．Yes，they do |
—Did they clean the house yesterday？
—________，They cleaned at five o’clock．
| A．No，they didn’t |
| B．Yes，they did |
| C．No，they don’t |
| D．Yes，they do |
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