Complete the sentences with the correct zero conditional forms of the verbs in brackets.
1. If we ... (not to water) flowers at home, they ... (to die).
2. If you ... (not to speak) any foreign language, your travelling ... (not to be) comfortable.
3. If you ... (to want) to enter a university, you ... (to have) to work hard.
4. If you ... (to speak) some foreign language, you ... (to have) better job opportunities.
5. If the weather ... (to be) warm in spring, the ice ... (to melt).
6. If the weather ... (to be) very cold in winter, rivers and lakes ... (to be) frozen.