All the task __________ ahead of time, so they decided to go on holiday for a week.

A．having finished

B．had finished

C．having been finished

D．had been finished

对广告、营销人员等外界刺激反应灵敏，对购物环境和周围人物适应快，但容易随着环境的改变而转变自己的观点的消费者是( )。

A．胆汁质消费者
B．多血质消费者
C．黏液质消费者
D．抑郁质消费者