<span>1)Do large cities with thousands of smoky industrial enterprises appear all over the world today?общий
</span>When do large cities with thousands of smoky industrial enterprises appear all over the world ? специальный
What appears all over the world today?вопрос к подлежащему
<span>Large cities with thousands of smoky industrial enterprises appear all over the world today,don`t they?разделительный
</span><span>Do large cities with thousands or hundred of smoky industrial enterprises appear all over the world today?альтернативный
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2)Since ancient times Nature has served Man, being the source of his life,hasn`t it?разделительный
Has </span>Nature served Man being the source of his life since ancient times?общий
What has served Man being the source of his life since ancient times?вопрос к подлежащему
When has Nature served Man being the source of his life ?специальный
Has Nature served Man being the source of his life since ancient or modern times?альтернативный
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3) Does world industry pollute the atmosphere with about 1000 million tons of dust every year?общий
</span><span>Every year world industry pollutes the atmosphere with about 1000 million tons of dust,doesn`t it?разделительный
</span><span>What pollutes the atmosphere with about 1000 million tons of dust every year?вопрос к подлежащему
</span>When does world industry pollute the atmosphere with about 1000 million tons of dust?специальный
Does world industry pollute the atmosphere with about 1000 million tons of dust every month or every year?альтернативный
4)The most horrible ecological disaster befell Ukraine and its people after the Chernobyl tragedy in April 1986,didn`t it?разделительный
When did the most horrible ecological disaster befall Ukraine and its people?специальный
Did the most horrible ecological disaster befall Ukraine and its people in April 1985 or 1986?альтернативный
Did the most horrible ecological disaster befall Ukraine and its people after the Chernobyl tragedy in April 1986?общий
I don't know him well enough.
You have asked me enough questions today.
They have enough time to do the job.
She looks enough pretty to be photographed.
You know enough English worlds to translate the text.
It do be good and enough.(не уверен)
There are enough vegetables in the house.
