1. You must have a first aid knowledge in case of an accident.

2. Don't move ......................... the burglar sees you .

3. The school administration will take some precautions .............. some students smoke at school.

4. The police will come as soon as possible ......................... an explosion.

5. I have set the alarm clock ......................... I'm late in the morning.

6. I'll stay at home ......................... the plumber comes.

7. I'll study harder ......................... I fail.

8. Take care of your young brother......................... he touches the stove.

9. ......................... an economic crisis, the investors should behave consistently.

lO.Our country must be careful......................... another country attacks it.