6 Put the verbs in brackets into the correct tense. What type of conditional is each sentence?
1 When water freezes, it (become) ice.
2 If it rains, we (not/go) to the exhibition centre tomorrow.
3 If you heat ice, it (melt).
4 If you're hot, (open) the window
5 If the tickets (not/be) expensive, we'll go to the theatre.
