Choose the correct words in the conditional sentences. 1.if scientists find/found a cure for aids, it would save lives around the world. 2.if diseases didn't/don't exist, more people would reach their 100th birthday. 3.if we use up all the world's oil, we need/ll need more renewable energy. 4.if oil prices continue to rise, petrol gets/will get more expensive too. 5.if scientists made human clones, i think the world will/would be a dangerous place

1.find 2.didn't 3.will need. 4.will get 5.would

thomas edison

thomas edison an american inventor was born in 1847, in state ohio and died in 1931, in state new-jersey. he developed many useful devices, such as electric lighting and he also invented some other important things for society. his first power station was on manhattan island, in new york. he was the first man who invented a light bulp model in 1879. he also succeeded in making telegraph. his brilliant knowledge greatly influenced people's life and made it more comfortable and easier.

Dear oleg, i was very glad to hear from you again. sorry, i haven't written for ages because of my school activities. i think that my school is the best one. i love it very much. our teachers are kind and intelligent and my classmates are smart and friendly. but everybody has a dream. the dream about our new school - the school of the future. now i would like to tell you a few words about my ideal school. first of all if i were a headteacher of my school i would allowed everybody to have an opportunity to use one's phone. the second thing is our homework. so much of it! don't the teachers know that it is waste of time, our time and theirs. the next. our holidays. i would like to travel a lot. but when? our holidays must be a bit longer i think. and at last the equipment of our classrooms! what do we see? there are few computers which we can use. my dream is every classroom has ten and more new computers with internet. it's school of my dream. that's for me today. i have to go. best regards to your family.write soon. andrey