A works with a chemicals import&export company,but A__for th

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/14 01:13:12

A works with a chemicals import&export company,but A__for this ihdustrial fair since A is on leave
选项：A.has worked B.works C.has been working D.is working,
这个专四题遇见到两次,但答案不同,老师也比较纠结.有选C 也有选D 的,请问如果专四真考到了到底选哪个啊?还有,since意思是“自从”还是连词“因为”,详细点!谢啦!
希望各位大师尽快答复.急需答案.谢啦啊.

C和D是两种语境吧,表示的意思不一样,选D的话应该表示的意思是他准备要走,那么since自然就是因为的意思了,选C的意思是在他离开之前,一直是A在做这件事情的,那么since就是自从的意思了
再问：如果是自从的话，时态不对吧？c项用的是现在完成进行时，而since后用的是一般式，到底该选哪个呢？

A works with a chemicals import&export company,but A__for th Mr.White works with a chemicals import & export company ,but 1.Mr.White works with a chemicals import& export company,but 一道语法题求助Mr.White works with a chemicals import&export company 英语语法题~Mr. White works with an import and export company, but 1.Mr.White works with an import and export company,but he___ import and export Company 英语翻译a foreign trade corporation with import-export operation 找英语强人帮忙,write a letter to a import and export trade company. Mr Smith works with a chemical company,but he_ for the indus Mr.Smith works with a mobile company,but he ____for this int Mr.Smith works with a mobile phone company,but he __________