Ⅰ、1、 knife
2、 themselves
3、 salt
4、 heat
5、 burning
Ⅱ、
Ⅲ、 1、 Don't open the door, please.
2、 Be careful with knives.
3、 Don't keep poisons in the kitchen.
4、 Keep the floor dry.
5、 It is good for your health to get up early.
Ⅳ、 1、 I'm afraid my leg is broken.
2、 Which leg?
3、 Let me have a look.
4、 Could you please take me to the hospital?
5、 But how can we go to the hospital?
Ⅴ、1、 accident
2、 drivers
3、 other
4、 knowing
5、 called
6、 traffic
7、 police
8、 own
9、 carelessly
10、 take