用括号内所给词的适当形式填空。

1. Many books and magazines are         _ (aim) specifically at teenagers.

2.You should buy a dictionary. It's very         _ (use) for your study.

3. They asked me so many questions that I got _         (confuse).

4.When you buy something, you have to be        _ (care).

5. Don't believe him.  He didn't tell you the            (true).

决策机关进行科学决策的主要前提是[ ]

A．召开信息发布会

B．赋予公民广泛的民主权利

C．拓宽民意反映渠道

D．决策机关自律活动