The problem was raised ________ we should get all the machines________.
| A．that/ to repair | B．which/ repaired |
| C．where/ to be repaired | D．when/ repaired |
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The problem was raised ________ we should get all the machines________.
| A．that/ to repair | B．which/ repaired |
| C．where/ to be repaired | D．when/ repaired |
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