Исправить ошибки (в контексте предложения) в словах, которые обозначены скобками!
correct the mistakes printed in bold. explain your corrections.
1. we (will be waiting) here until he plugged in the laptop.
2. i forbid you to use the computer till you (have been) sixteen.
3 when sophia comes back next month, it (is) three years since she (was) away. 4.scientists (find) it difficult to cure many illnesses until the level of technology was improved.
5 she never uses her mobile when the battery (had been) low.
6 last week, sam (requires) a refund when he (discovers) that his 4 new digital camera (is) broken.
7 until you bought me a cellular, i (used) a land-line phone.
8 tomorrow tom (pay) the connection fee when he go to work.

Present simple: 1.our family has a sportcar which is very fast. 2.fast trains run fast but slow trains run slowly. 3.my eldest brother goes to university 5 times a week. 4.misha does his chores every week. 5.my girlfriend and i often go for a walk after school. 6.does he live there? 7.i   study physics and maths at school everyday. 8.galina dances very good. 9.do you listen to pop-music? 10. what do you think about jane? present continuous: 1.i am going to help my mum today. 2.he is running after someone  right now! 3.my father is still reading that newspaper. 4. don't bother me, i am writing! 5. he is always taking my books. 6. lera is studying hard at the moment. 7. who am i speaking to? 8. i am thinking how i can fix this machine. 9. my girlfriend is smiling someone right 10. the president is having an audience at the very moment.

Moscow is the biggest center and the capital of russia. the city has a long history. the first mention about moscow refers to the 12th century ad. the founder of the city is the prince yury dolgoruky. the name moscow derives from the name of the river that flows through the city. during the long history of the city, it was repeatedly invaded, burned, but always reborn and rebuilt. it’s difficult to overestimate the beauty of moscow. its magnificent decoration was admired by many writers and poets. its picturesque streets and areas have become an integral part of many literary works. architecture of moscow strikes with its variety and uniqueness. many old buildings and constructions have preserved till our days. a number of monuments are included to the unesco world heritage list. the most outstanding are - red square and the moscow kremlin, novodevichy and donskoy monasteries, tsaritsyno, ostankino, kuzminki estates. also we should name the world famous bolshoi theatre. but it’s impossible to list all the monuments of this beautiful city. moscow is full of parks, museums, theaters and art galleries. it is a center of cultural and economic life of russia. large number of famous russian institutes and universities, banks and companies is situated here. many tourists enjoy visiting moscow. the city has great number of hotels and restaurants. moscow is also the center of political life. here is situated the residence of the state duma and the president of the russian federation. today moscow is a modern european city with a multi-million population. it is rapidly evolving and becoming more and more beautiful.read more: