write the correct form of each verb in bracket
`1.` If the Earth (be)....is..... warmer, the sea level (rise).....will rise.....
`2.` If the sea level (rise).....rises......, some countries (disappear).......will disappear......
`3.` If we (reduce).......reduce...... soil pollution, we (have)......will have....... enough food to eat.
`4.` If we (not have)......don't have....... enough food, we (be)......will be....... hungry.
`5.` If we (be)....are.. hungry, we (be)....will be..... tired.
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