Помогите, пж. Revise grammar from the Introduction and click the right option to complete the sentences.
1) Human activity (have caused/has caused/has cause) a lot of environmental disasters around the world.
2) The amount of rubbish should (be reducing/be reduced/been reduce)
3) If we don’t stop polluting the environment, another ecological catastrophe (will going to happen/will be happen/is going to happen)
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