best. Telephone and computer make our life easier, artificial heart, keyhole surgery and laser save many lives and improve health; solar-powered cars help to solve problem of air pollution. ) Thats right. I agree with you.
4) Объявление домашнего задания, выставление оценок.
Your work was good! I hope youve learned something new. Probably these inventions will stimulate you to create something new. Your homework will be to write about any other invention, may be the latest science invention and to tell about it. So, the lesson is over. Good bye.
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