A whole series of mistakes leading to the present dilemma( )by the section manager.A.have been made B.was madeC.has been made D.were made

There have been a whole series of accidents on this road 改错 a series of 是a series of factors还是a series of reasons a series of a serious of 区别 a whole pile of a whole slew of the last of a series of competitions A whole series of mistakes leading to the present dilemma( )by the section manager.A.have been made B.was madeC.has been made D.were made a series of ,后面加什么词 a series of books翻译成中文 用a series of造句,急用! set down a series of的意思 英语翻译Due to the wide ranging analyte polarity,the optimum elutionsolvent system had to incorporate a series of solvents to eluteall the analytes effectively.After conditioning and equilibratingthe solid phase extraction cartridges,1 mL of a mi The TV series of Gong become popular and the theme song Love the feed sung by Yang Mi was a＿ at once and loved by young people.A,sh0lk B.strike C.hit D.beat a series a series a series a series of和a trail of的区别