【英语现在完成时与现在完成进行时的问题Mr.Chen______thecompanyfiveyearsago,thatis,he______thecompanyforaboutfiveyearsuntilnow.A.hastakenchargeof,hasbeentakingchargeofB.tookchargeof,hasbeentakingchargeofC.t】

　　英语现在完成时与现在完成进行时的问题

　　Mr.Chen______thecompanyfiveyearsago,thatis,he______thecompanyforaboutfiveyearsuntilnow.

　　A.hastakenchargeof,hasbeentakingchargeof

　　B.tookchargeof,hasbeentakingchargeof

　　C.tookchargeof,hasbeeninchargeof

　　D.wasinchargeof,isinchargeof

　　【纠结BC选项,我觉得untilnow=bynow=sofar,所以是不是固定地与现在完成时搭配?但又感觉后半个句子意思表明他5年里一直在经营这个公司,是不是用现在完成进行时?还有如果把untilnow去掉选项改变吗?