[典例剖析] 从方框中选择合适的单词填空。

1. There will be some new rules about food .
2. I am pleased to hear that they arrived home .
3. Playing in the street is not for the children.

1. safety 2. safely 3. safe

[反馈练习] 用 safe 的适当形式填空。
1. It is to cross the river in this boat.
2. Keep your passport in a place.
3. How can we use the knife ?
4. Parents are always worried about the of their children.
5. Will the money be in the drawer?

1. safe 2. safe 3. safely 4. safety 5. safe