Complete the sentences with the correct form of the verbs in brackets. Use the zero or first conditional.

1. He's very keen on walking. He ...... (go) hiking in the countryside every weekend if it ....... (not rain).
2. I can't go out this evening. If I ..... (not revise) for my geography test tomorrow, I ..... (fail) it.
3. The weather is uncertain at the moment, and I'm afraid we ..... (not go) climbing later in the afternoon if it ....(get) any worse.