结构化方法工作阶段划分为提出任务、初步调查、可行性分析、详细调查、【 】、系 统的物理设计、系统实施及系统的运行和维护。

—I'm afraid these flowers won't be able to live through the winter.

—But I think otherwise. You see， measures　　　　to take good care of them.

A．have taken

B．had been taken

C．will take

D．are being taken