Being a doctor is one of the few professions＿＿＿＿if you make a mistake，it can mean somebody's life．
| A．that | B．which | C．when | D．where |
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Being a doctor is one of the few professions＿＿＿＿if you make a mistake，it can mean somebody's life．
| A．that | B．which | C．when | D．where |
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