根据句意和首字母填入恰当的词 

1. We were completely in the d __    about his movements.    

2. Her answer is r_____.    

3. If you want to s  __    . money, you had better buy second-hand books.    

4. I w____ about the exam tomorrow because it's very difficult.  

5. I used to eat c____ all the time. It's bad for my teeth.

在决策阶段办理各种有关安全与环境保护方面的手续是( )的主要任务。

A．建设单位

B．设计单位

C．施工单位

D．监理单位