初二英语求助

What are Peatter and John doing?I hear they are ( )on a new machine.A.getting B.at work C.going D.running请问该选哪个？为什么呢？

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2010-09-11

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    1、get on 进展 Everything was getting on very well。一切进行得很顺利。 2、at work 在工作 They are at work on a new dictionary。
   他们在编一本新字典。 3、go on 继续下去 If he goes on like this he'll lose his job。     如果他继续这样下去,他会丢掉工作的。

   4、run 开动(机器) 及物动词（直接接宾语） He has learned to run the machines。他学会了开那台机器。所以选B I hear they are ( at work )on a new machine 。

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