题目内容
2. It was the nurse who was on when you had your accident.
A. guard B. watch C. task D. duty
2. D on duty意为"值班"，符合本句的意思：值班的护士。 on guard意为"站岗，执勤"。
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题目内容
2. It was the nurse who was on when you had your accident.
A. guard B. watch C. task D. duty
2. D on duty意为"值班"，符合本句的意思：值班的护士。 on guard意为"站岗，执勤"。