David couldn't tell __________ from far away whether the green traffic light meant going straight or turning left.
| A．on purpose |
| B．at random |
| C．in short |
| D．for sure |
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David couldn't tell __________ from far away whether the green traffic light meant going straight or turning left.
| A．on purpose |
| B．at random |
| C．in short |
| D．for sure |
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