Make the sentences interrogative.make the same sentences negative.​

1)All progressive people( fight) for peace.
2)When was the radio( invented)?
3)When was ,,War and Peace,, (written) by Tolstoy?
4)Chemically pure water is never ( met) with in everyday life.
5)Much attention(is paid) to the living condiyion of people in our country.
1)My sister(was invited) to the birthday party by her friend yesterday.
2)More and more houses(are build) in our country from year to year.
3)We( open) the window after every lesson.
4)We(will finish)our experiment in a week.
5)Young trees(were plant)in the street last autumn.
6)I( answered)my brothers letter last week.

The Amur (Ussuri) tiger, a rare subspecies of the cat, which has been preserved on the territory of our country. It is known that on the coastal ridge of the Sikhote-Alin is still left in the least number of the population of these wild cats. Amur tigers in length can reach two meters. The tail is too long – up to one meter.

Амурский (уссурийский) тигр — редкий подвид кошачьих, который сохранился на территории нашей страны. Известно, что на береговом хребте Сихотэ-Алиня еще осталась в наименьшем количестве популяция этих диких кошек. Амурские тигры в длину могут достигать два метра. Хвост у них тоже длинный – до одного метра.