题文
Thank you for giving me a hand.I___in the experiment without your valuable help
| A．have failed |
| B．will fail |
| C．would have failed |
| D．must have failed |
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Thank you for giving me a hand.I___in the experiment without your valuable help
| A．have failed |
| B．will fail |
| C．would have failed |
| D．must have failed |
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