Ivariant fill in: reduce,nail, emit, in danger, nesting boxes, have to. power stations burn coals and fumes. we air pollution. tim is using a hummer many animals more food. fill in the question tags in the sentences. they are planting the trees, rose is cleaning out the pond, he visited his friend yesterday, she can’t go, sam hasn’t finished this project, complete with the present perfect continuous form of the verbs in brackets. she ) here for over eight years. ) on the telephone for ten minutes. how ) for him? i ) this book since i was twenty. they ) this exercise for three hours. how long )? ii variant fill in: harmful, collect rubbish, recreate, poisons, don’t have to, plastic bag. when acid rain flows through the soil, and plants. factory smoke the environment. john is using the zoos cannot an animal’s natural habitat. i go to school today. fill in the question tags in the sentences. tom is reading this book, dan and tony are teaching the cycle of life, she planted the flowers, he can’t do this task, they haven’t known this answer, complete with the present perfect continuous form of the verbs in brackets. ) english for six years. how ) this music? diana ) to find her exercise book. my ) here since she was twenty-five. i ) you for half an hour. how long ) football?

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