Make your own sentences with the following words:

absolutely, be founded (быть основанным), carry on, clarify, completely, express, extremely, festivity, have sb in the palm of one`s hand (иметь власть над кем-либо; one`s/sb`s меняем на соответствующее притяжательное местоимение!!!), hold sb`s attention, interrupt, plot, quite (не путать с quiet!!! (тихий, спокойный)), recover, sense of humour (amer. humor), star (v), totally, wonder.

Use the Conditional Mood (0, I, II, III)

1.  water  pollution and air  pollution lead to the upsetting of  the oxygen balance,  destruction  of  the  ozone  layer, and disappearance  of  rare  species  of  animals,  birds,  fish  and  plants.  a number  of rivers and lakes dry up.  2.  some species of animals, birds, fish and plants disappeared forever  because  their  natural habitats  were  destroyed.  3.  man's  careless interaction  with  nature can lead to ecological  crisis. 4.  it  was  the most horrible ecological disaster which  befell ukraine and its people.  it  was  caused  by the accident at the chernobyl nuclear power station in april 1986. a great damage has been done to ukraine's agriculture, forests and people's health. 5.  if  we want  to save  the world we live in,  we should  learn how  to use the environment carefully and do  our  best  to protect it from our  destructive activities.