Исправь ошибки-зачеркни лишнее слово! 1.excuse me, where's is the hospital? 2.it's quarter past eleven o'clock. 3.i am don't havve to go to school on saturday. 4.he has violin lessons twice times a week. просто так не пишите !

1. Excuse me, where's the hospital?
(Мы убрали повторяющееся слово is, т.к. where's  = where is)
2. It's quater past eleven.
(Здесь мы убрали слово o'clock, т.к. когда мы употребляем в предложении словосочетание quater past, слово o'clock приписывать не нужно)
3. I don't have to go to school on Saturday.
(Здесь нам не нужно am. Когда мы говорим про действия, которые мы совершаем на регулярной основе, мы используем конструкцию Present Simple. Предложения в Present Simple строиться примерно так:
Подлежащее + глагол в начальной форме + дополнительные слова
И здесь нам am просто не нужно. Am/are/is обычно употребляется в Presnt Continious.)
4. He has violin lessons twice a week.
(Слово times здесь лишнее. Когда мы хотим сказать, что делаем что-то один или два раза в неделю (или месяц, год и т.д.) в Present Simple, то мы пишем once a week или twice a week. Вот зато если мы хотим сказать, что делаем что-то три, четыре или более раз в неделю (месяц, год и т.д.), то говорим three times a week или four times a week, five times a week... и т.д. и т.д. Это такое правило, и его надо просто выучить.)

Удачи!

Over 1,800 kilometers that separate the southern border of Kazakhstan from the north, followed by several landscape zones: steppe, steppe, semidesert and desert. In the west, the territory of Kazakhstan borders the Caspian Sea in the east - the taiga Altai, and in the south - with the high peaks of the Tien Shan. The lowest point - Karagiye on Mangyshlak (132 meters below sea level), the highest - Khan Tengri peak in the mountains (7000 meters above sea level). Three major rivers - Irtysh, Tobol and Ishim - carry their water in the Arctic Ocean, the other Kazakh rivers empty into inland water bodies: the Caspian Sea, the Aral Sea, Balkhash, or simply spread out over the steppe or desert. The western part of Kazakhstan is almost entirely flat, and the east - mostly mountainous, besides such as the high mountains of the Tien Shan and Altai, considerable space is occupied Tarbagatay Saur, Kazakh low hills, Kokshetau hill.
In Kazakhstan, grows more than six thousand plant species (of which 515 - only here), its open spaces can be found about 500 species of birds, 178 species of mammals, 49 species of reptiles, 12 species of amphibians, and in the rivers and lakes - 107 species of fish.
The diversity of invertebrates is still more alone insects live here for at least 30,000 species, and besides them - a few thousand species of mollusks, worms, spiders, crustaceans, and others. Думаю вот так... 

Over 1,800 kilometers that separate the southern border of Kazakhstan from the north, followed by several landscape zones: steppe, steppe, semidesert and desert. In the west, the territory of Kazakhstan borders the Caspian Sea in the east - the taiga Altai, and in the south - with the high peaks of the Tien Shan. The lowest point - Karagiye on Mangyshlak (132 meters below sea level), the highest - Khan Tengri peak in the mountains (7000 meters above sea level). Three major rivers - Irtysh, Tobol and Ishim - carry their water in the Arctic Ocean, the other Kazakh rivers empty into inland water bodies: the Caspian Sea, the Aral Sea, Balkhash, or simply spread out over the steppe or desert. The western part of Kazakhstan is almost entirely flat, and the east - mostly mountainous, besides such as the high mountains of the Tien Shan and Altai, considerable space is occupied Tarbagatay Saur, Kazakh low hills, Kokshetau hill.
In Kazakhstan, grows more than six thousand plant species (of which 515 - only here), its open spaces can be found about 500 species of birds, 178 species of mammals, 49 species of reptiles, 12 species of amphibians, and in the rivers and lakes - 107 species of fish.
The diversity of invertebrates is still more alone insects live here for at least 30,000 species, and besides them - a few thousand species of mollusks, worms, spiders, crustaceans, and others. Думаю вот так...