对本单元所学基础知识进行全面测评。

I. 单项选择（共20小题，每小题1分，计20分）

选出可以填入空白处的最佳选项。

1. Look at __________ bell on their door. It is ___________ new one.

A. the, the          B. a, a             C. the, a            D. a, the

2. We must try our best to prevent them ___________ doing such silly things again.

   A. about            B. from            C. against          D. for

3. Danny, have you noticed those important ____________ rules on the wall?

   A. safety            B. safety’s         C. safe             D. safe’s

4. The house is on fire. We must put out the fire ___________.

   A. slow             B. slowly          C. quick            D. quickly