单项选择题
【案例分析题】
Directions：After reading the following passage，you will find 5questions or unfinished statements，numbered 36through 40.For each question or statement there are 4choices marked A，B，C，and D.You should make the correct choice.
A major new development in systems of work in Britain is taking place.Flexible working hours，or ’Flextime’，are catching on fast，and this trend is continuing.In 1973，over 500’organizations had adopted the idea，and by 1974，this number had risen
Flexible working hours were firstly used by the（）.
