September 2018 1 18 Report
First conditional
1. Complete the text with the correct form of the verbs.

Ozone is gas. A layer of ozone surrounds the Earth and protects us from the sun`s heat. If we don`t protect the environment, we`ll destroy the ozone layer. At the moment, there are holes in the ozone layer above the Arctic and the Antarctic. If we (1)______ (destroy) the ozone layer, the Earth
(2)______ (become) very hot. If the Earth (3)_______ (become) very hot, the sea level will rise and people (4)_______ (not survive). If it (5)_______ (be)
impossible to live on Earth, perhaps people (6)______ (move) to Mars!
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