---Where are your parents?
---They are in the kitchen, they ______the dinner for the party the whole day.
| A．are preparing | B．have been prepared |
| C．have been preparing | D．were preparing |
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---Where are your parents?
---They are in the kitchen, they ______the dinner for the party the whole day.
| A．are preparing | B．have been prepared |
| C．have been preparing | D．were preparing |
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