Put the verbs in brackets into the correct tense.
1)If you go to the clean-up day, I (come) with. 2)Unless we help endangered animals, they (become) extinct.3) If you recycled your paper, you(help) the envitonment.4) If acid rain falls in a lake, it (pollute) the water. 5) If we chop down the trees, animals (lose) their homes.6) If I were you, I (try) to recycle more glass. 7)If the temperature rises above zero degrees, ice (start) to melt.

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