I haven't finished my composition. I ____ for two hours and a half.
| A．have written it |
| B．have been writing it |
| C．wrote it |
| D．am writing it |
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I haven't finished my composition. I ____ for two hours and a half.
| A．have written it |
| B．have been writing it |
| C．wrote it |
| D．am writing it |
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