—Mum， let’s go shopping together.
— Can’t you see I’m so busy， dear? I _______ tomorrow’s meeting.
| A．prepare | B．am preparing |
| C．was preparing | D．have prepared |
—Mum， let’s go shopping together.
— Can’t you see I’m so busy， dear? I _______ tomorrow’s meeting.
| A．prepare | B．am preparing |
| C．was preparing | D．have prepared |
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