用火柴摆出正方形，用多少根火柴才能摆出6个正方形？尽可能多地设想各种方案，（注：要求摆出的6个正方形中每个正方形的边长限于一根火柴的长）
如图所示：
Only after I sent out scores of job application _______ an offer from a small company.
A．had I receive
B．did I receive
C．I had received
D．I received
文书工作人员应具备哪些素质要求？
