__modelingbusinessisbynomeanseas?
__modeling iness is by no means easy to get into,the good model will always be in demand A While B Since C As D If
此处明显表示因果: 四个答案只有B了, 由于...因为... 并无转折关系,while(尽管虽然/当...时候), 或者as(正如,就...而言,当...), if(如果/是否)都不恰当 由于modeling行业绝对不容易进入,所以好的modeling总是紧缺.(有需要,销路好,供不应求)