— Why, David, you look so tired!
— Well, I ________an article and I must finish it tomorrow.
| A．was writing | B．will be writing |
| C．have been writing | D．have written |
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— Why, David, you look so tired!
— Well, I ________an article and I must finish it tomorrow.
| A．was writing | B．will be writing |
| C．have been writing | D．have written |
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