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Scientific activity is the main engine of progress and it opens up endless prospects for the future of society and civilization.

Общий:

Is scientific activity the main engine of progress?

Does scientific activity open up endless prospects for the future of society and civilization?

Альтернативный:

Is scientific activity the main engine or the main stop of progress?  

Does scientific activity open up or close endless prospects for the future of society and civilization?

Разделительный:

Scientific activity is the main engine of progress, isn't it?

Scientific activity opens up endless prospects for the future of society and civilization, doesn't it?

Специальный:

What is scientific activity?

What does scientific activity open up?

К подлежащему:

What is the main engine of progress?

What opens up endless prospects for the future of society and civilization?

There are a lot of good holiday in the world, but i think that the best holiday for me is Day of bithday. It holiday celebrate every people in every country every year. At my bithday i prepare a lot of food, invite a lot of quests. In this day i have a lot of gifts. I like my bithday very much. It is the best holiday.My favourite Holliday is my birthday! I love it so much because I meet my friends. And also I love, when my mummy make a cake! She makes it every year. Every year is different. We always spend my birthday in different places. For example last year me and my friends played bowling!