---Excuse me, Mum. When can we have dinner?
---Not until it ___________ in half an hour.
| A．is prepared | B．will be prepared |
| C．has been prepared | D．was prepared |
---Excuse me, Mum. When can we have dinner?
---Not until it ___________ in half an hour.
| A．is prepared | B．will be prepared |
| C．has been prepared | D．was prepared |
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