Unit 3 Language in use
导学目标：
1. 掌握情态动词 must, can, could 表推测。
2. 掌握祈使句的用法。
自主预习：
一、根据句意及首字母补全单词
1. K_________ money in a safe place.
2. We played basketball i_________ because it rained.
3. I'll hear a footstep on the s__________.
4. Earthquake is very c____________ in Japan.
5. Many earthquakes can cause a lot of d__________.
6. They c____________ people from the beach.
