Помогите составить монолог по теме вред загрязнения окруж.среды

В треугольнике ABC угол С равен 90 градусов, АС равно 8, cosA равно 0,8. Найдите ВС

расставить коэффициенты методом электронного баланса NaI + NaIO3 + H2SO4 = I2 + Na2SO4 + H20

part 1.choose the corect item 1 ... wanted to go where a)Why b)Who c)when 2) he is going .... the poem a)learn b)learns c)to learns 3 -who sants to dance -the girls ... . a)do b)wants c)want 4) it is ... beautiful room in the house A)more B)most C)the most 5). who ... history A)does studyB )do study C)studies 6) michael looksolder ... his friend. A)than b)then c) - 7). ... have got a dog. a)orlovs b)the orlovs'  c)the orlovs 8) is she in ... first form a)a b)the  c)-  9) granny ... make cakes every day a)don't  b)isn't c)doen't 10) once there lived ... funny elephant a)a b)an c)the           part 2. fill in 'S or S'       1) the sportsmen ... bags are in the room 2) I have got a friend. My friend ... uncle works in London 3) I have got two friends. My friend ... parents works in moskow. 4) Mary isn't Mr Smith ... sister 5) spot is the smith ... dog.                         part 3. write a tag for each sentence.       1) we have got a lot of juice, ...     2) you can't go there, ...    3) there is some apple juise , ...  .    4) It is in apple, ...  .   5) the apples were nice, ...