Task 2: Zero or First Conditional? Complete the sentences with the correct form of the verbs in brackets. Use the Zero or the First Conditional.

Example: If I feel (feel) sad, I usually phone my friends.
1. If I ............(to be) late, .................(not/wait) for me.
2. If you ....................(go) to bed early, you ....................(feel) yourself well.
3. Water .........................(boil) if the temperature .....................(to be) 100 C.
4. If there .................(to be) a fire, the alarm ...................(ring).
5. If she ...................(have) a problem, she ...................(talk) to her best friend about it.