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请教高手,是否新概念二课本有误

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请教高手,是否新概念二课本有误
Lesson 45 A clear conscience
课文中有句:It had been wrapped up in news** and it contained half the money he had lost.
课后习题, Vocabulary 词汇中有句:The thief had wrapped the wallet in news**.
问题: 请问课文中的那句是否不应该有up?why?
Lesson 52 Hot snake
课文中有句:A brid had snatched up the snake from the grond and then drapped it on to the wires.
课后习题,Structure 句型中有句:The bird had snathed the snake from the ground.
问题同上.
还有一句:
This morning,however,a firemen accidentally discovered the cause.
此句中为什么是firemen?
请教高手,是否新概念二课本有误
两处课文里面都没有错误,用法相同.wrap sth up or wrap sth都可以用,在这里及物动词用于被动语态中.wrap up强调把东西包起来,包好,up强调的是动作的完整性.
as for the last question,it should be a mistake!A fireman rather than a firemen
下面这些词是不是敲错了?
bird,ground,drop,snatch