高中英语完成时
---Haveyoubeenteachingheresincegraduation?---No,I____farmfor5years.
A.workedB.haveworkedC.wasworkingD,hadworked
为什么选A不选B?
CathyistakingnotesofthegrammaticalrulesinclassatSunshineSchool,whereshe___Englishforayear.?
A.studiesB.studied?C.isstudyingD.hasbeenstudying
为什么这个选D如果把Cathyis换成Cathywas是不是选B呢?为什么?
谢谢了!
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