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1. They consider that those pesticides..the soil
A) were ruined
B) ruined
C) ruin
D) are ruining
2. They were sure that those pesticides … the soil. A) were ruined. B) ruined. C) ruin. D) are ruining

1. They consider that those pesticides       C) ruin       the soil2. They were sure that those pesticides        B) ruined      the soil.