题文
He was told that it would be at least three more months _____ he could recover and return to work.
| A．when |
| B．before |
| C．since |
| D．that |
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He was told that it would be at least three more months _____ he could recover and return to work.
| A．when |
| B．before |
| C．since |
| D．that |
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